High-integration laser radar light source

Abstract

The utility model relates to a laser radar light source with high integration level. The laser radar light source comprises a seed light source and a first pump light source. The seed light source and the first pump light source are connected with an input port of the input end integrator; one end of the active optical fiber is connected with the output end of the input end integrator, and the other end is connected with the input port of the output end integrator; a first isolator of the input end integrator isolates the seed light source from the active optical fiber; the input end integrator synthesizes pump light generated by the first pump light source into the active optical fiber; the seed light source generates first signal light; the active optical fiber absorbs the pump light of the first pump light source and amplifies the first signal light of the seed light source to obtain second signal light; and the output end integrator outputs the second signal light through the output end of the output end integrator and returns the pump light to the active optical fiber. According to the utility model, only four optical fiber connection points and eight optical fiber end faces are needed, and high integration, ultra-low loss and ultra-high reliability of the whole structure are realized.

Description

Technical Field

[0001] The utility model relates to a highly integrated laser radar light source, belonging to the technical field of laser radar light sources. Background Art

[0002] LiDAR is one of the essential core sensors in the multi-sensor system of future intelligent assisted driving, drones, and driverless cars. With the rapid development of the driverless market, more and more companies are joining in the development of new applications for LiDAR and the pursuit of advanced technology. As the price of LiDAR will drop significantly due to the maturity of technology, more and more models will be equipped with LiDAR.

[0003] As the current laser radar technology matures, in order to improve detection accuracy and detection distance, the requirements for narrow pulses and high peak optical power indicators of laser light sources are also increasing. Laser light source is one of the core components of automotive laser radar. The ideal light source for automotive laser radar is high eye safety, high power, short pulse, high beam quality, high reliability, low price, small size, and longer detection distance.

[0004] refer to Figure 1 In an existing on-vehicle laser radar light source, the seed light source emits a 1550nm band signal light which is input from the input end of the high-power isolator. The output end of the high-power isolator is a dual-fiber wavelength division multiplexing. The pump light source (980nm) is combined with 1550nm through wavelength division multiplexing at the output end of the high-power isolator. The seed light source and the pump light source are coupled together and enter the erbium-doped fiber together. The optical signal amplified by the erbium-doped fiber passes through the detector, and a part is separated to realize real-time monitoring of the working status of the amplifier. The remaining amplified optical signal is output through the high-power isolator. Two high-power isolators are required in this light source structure, one of which has a wavelength division multiplexing function to realize the multiplexing of the seed light source and the pump light source, and the other is used at the output end; the erbium-doped fiber is only used once, requires a longer length, and is expensive. Due to the large number of optical devices, the erbium-doped fiber is longer, and the isolator can only output the fiber from the left and right ports. Therefore, the light source module needs to have enough space for the device placement and fiber winding when it is in the box, which makes the entire light source module relatively large. Utility Model Content

[0005] In order to overcome the above problems, the utility model provides a highly integrated lidar light source, the entire structure of which only requires 4 optical fiber connection points and 8 optical fiber end faces, thereby achieving high integration, ultra-low loss and ultra-high reliability of the overall structure.

[0006] The technical solution of the utility model is as follows:

[0007] First aspect

[0008] A highly integrated laser radar light source comprises a seed light source and a first pump light source; the seed light source and the first pump light source are connected to an input port of an input end integrator; one end of an active optical fiber is connected to an output end of the input end integrator, and the other end is connected to an input port of an output end integrator;

[0009] The first isolator of the input end integrator isolates the seed light source from the active optical fiber;

[0010] The input end integrator synthesizes the pump light generated by the first pump light source into the active optical fiber;

[0011] The seed light source generates a first signal light;

[0012] The first pump light source provides energy to the active optical fiber;

[0013] The active optical fiber absorbs the pump light of the first pump light source and amplifies the first signal light of the seed light source;

[0014] The output end integrator isolates the output end of the output end integrator and the active optical fiber through a second isolator, isolates the pump light in the active optical fiber, and outputs a second signal light, that is, the output end integrator can output the second signal light through the output end of the output end integrator and return the pump light to the active optical fiber;

[0015] The output end integrator reflects the stray light generated by the active optical fiber out of the optical path;

[0016] The second photodiode is used for detecting and monitoring the second signal light and providing a synchronization signal at the same time.

[0017] Furthermore, the monitoring function of the output end integrator is used to monitor the second signal light and provide a synchronization signal at the same time.

[0018] Furthermore, the input end integrator includes three optical fiber heads, a birefringent crystal shift plate, a wave plate, a lens, a magneto-optical material, a magnet ring, a partial reflector, a photodiode and a glass tube which are sequentially arranged along the optical path direction.

[0019] Furthermore, the first optical fiber, the third optical fiber, the birefringent crystal shift plate, the wave plate, the lens, the magneto-optical material, the magnet ring and the partial reflector of the three-fiber head constitute the first isolator; the first optical fiber of the three-fiber head is used to input the first signal light generated by the seed light source, the second optical fiber is used to input the pump light generated by the first pump light source, and the third optical fiber is used to output the light integrated by the input end integrator;

[0020] The first optical fiber, the second optical fiber, the third optical fiber and the lens of the three-fiber head constitute an input end combiner of the pump light and the signal light;

[0021] The first optical fiber, the third optical fiber, the lens and the partial reflector of the three-fiber head constitute an input end optical splitter;

[0022] The first optical fiber, lens, partial reflector and photodiode of the three-fiber head constitute an input end detector.

[0023] Furthermore, the output end integrator includes a dual optical fiber head, a birefringent crystal shift plate, a wave plate, a lens, a magneto-optical material, a magnet ring, a heat sink, a notch filter, a partial reflector, a photodiode, a glass tube and an outer sealing steel tube arranged along the optical path.

[0024] Furthermore, the fourth optical fiber, the fifth optical fiber, the birefringent crystal shift plate, the wave plate, the lens, the magneto-optical material, the magnet ring, the notch filter and the partial reflector of the dual optical fiber head constitute an output end high-power isolator; the fourth optical fiber of the dual optical fiber head is used to input the second signal light and the pump light, and the fifth optical fiber is used to output the amplified second signal light demultiplexed by the output end integrator;

[0025] The fourth optical fiber, the fifth optical fiber and the lens of the dual optical fiber head constitute an output end splitter for the pump light and the signal light;

[0026] The fourth optical fiber, the fifth optical fiber, the lens and the notch filter of the dual optical fiber head constitute an output end notch filter for stray light;

[0027] The fourth optical fiber, the fifth optical fiber, the lens and the partial reflector of the dual optical fiber head constitute an output end optical splitter;

[0028] The fourth optical fiber, lens, partial reflector and photodiode of the dual optical fiber head constitute an output end detector.

[0029] Furthermore, the output-end integrator also includes a notch filter. If the output-end integrator does not contain a TAP-PD, the notch filter is perpendicular to the optical path of the first signal light, the signal light returns to the optical path, and the stray light is transmitted out of the optical path; if the output-end integrator contains a TAP-PD, the notch filter forms an acute angle with the optical path of the first signal light, the signal light continues to be transmitted, and the stray light is reflected out of the optical path.

[0030] Furthermore, the active optical fiber is an erbium-ytterbium double-clad optical fiber, the optical fiber used for inputting the first signal light is a single-mode optical fiber, and the optical fiber used for inputting the pump light is a multi-mode optical fiber.

[0031] Second aspect

[0032] A highly integrated laser radar light source, characterized in that it comprises a seed light source and a first pump light source; the seed light source and the first pump light source are connected to the input port of an input end integrator; one end of an active optical fiber is connected to the output end of the input end integrator, and the other end is connected to the input port of an output end integrator, and a second pump light source is connected to another input port of the output end integrator;

[0033] The first isolator of the input end integrator isolates the seed light source from the active optical fiber;

[0034] The input end integrator synthesizes the pump light generated by the first pump light source into the active optical fiber;

[0035] The seed light source generates a first signal light;

[0036] The first pump light source and the second pump light source provide energy for the active optical fiber;

[0037] The active optical fiber absorbs the pumping light of the first pumping light source and the second pumping light source, and amplifies the first signal light of the seed light source;

[0038] The output end integrator isolates the output end of the output end integrator and the active optical fiber through a second isolator, isolates the pump light in the active optical fiber, and outputs a second signal light, that is, the output end integrator outputs the second signal light through the output end of the output end integrator, and returns the pump light to the active optical fiber;

[0039] The output end integrator reflects the stray light generated by the active optical fiber out of the optical path;

[0040] The second photodiode is used for detecting and monitoring the second signal light and providing a synchronization signal at the same time.

[0041] The utility model has the following beneficial effects:

[0042] 1. The entire structure of the light source only requires 4 fiber connection points and 8 fiber end faces, achieving high integration of the overall structure, ultra-small size, ultra-low loss and ultra-high reliability.

[0043] 2. The input end integrator of the light source includes an input end isolator, an input end combiner, an input end optical splitter and an input end detector, realizing the integration of the input end. The output end integrator of the light source includes an output end high-power isolator, an output end wave splitter, an output end notch filter, an output end optical splitter and an output end detector, realizing the integration of the output end and simplifying the structure of the light source.

[0044] 3. This light source places the seed light source externally and realizes the function of an optical amplifier when the signal light is input externally.

[0045] 4. The light source ensures the highest possible transmittance of signal light and spontaneous radiation light to avoid self-oscillation of signal light in the active optical fiber; at the same time, the pump light is returned to the active optical fiber to achieve full absorption and utilization of the pump light and reduce the length of the active optical fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 Schematic diagram of the optical path structure of an existing vehicle-mounted laser radar light source.

[0047] Figure 2 This is a schematic diagram of the optical structure of a light source according to an embodiment of the utility model.

[0048] Figure 3 This is a schematic diagram of the optical structure of a light source according to another embodiment of the utility model.

[0049] Figure 4 This is a schematic diagram of the optical path structure of the input end integrator of an embodiment of the utility model.

[0050] Figure 5 It is a schematic diagram of the three-dimensional structure of the input end integrator of an embodiment of the utility model.

[0051] Figure 6 The figure is a schematic diagram of the optical path structure of the output integrator of one embodiment of the utility model.

[0052] Figure 7 This is a schematic diagram of the optical path structure of the output end integrator of another embodiment of the utility model.

[0053] Figure 8 This is a schematic diagram of the optical path structure of the output end integrator of another embodiment of the utility model.

[0054] Fig. 9 It is a schematic diagram of the three-dimensional structure of the output end integrator of an embodiment of the utility model.

[0055] The reference numerals in the figure represent:

[0056] 10, seed light source; 20, first pump light source; 21, second pump light source; 30, input end integrator; 40, active optical fiber; 50 / 51 / 52, output end integrator; 61, first photodiode; 62, second photodiode; 71, first isolator; 72, second isolator; 81, filter; 91, first optical fiber; 92, second optical fiber; 93, third optical fiber; 94, fourth optical fiber; 95, fifth optical fiber; 96, sixth optical fiber; 100, first signal light; 200, first pump light; 201, second pump light; 500, second signal light; 6 00, the first stray light; 301, three-fiber head; 302, birefringent crystal displacement plate; 303, wave plate; 304, lens; 305, lens wave-splitting film layer; 306, magneto-optical material; 307, partial reflection mirror; 308, magnet ring; 309, glass tube; 501, dual-fiber head; 502, birefringent crystal displacement plate; 503, wave plate; 504, lens; 505, lens wave-splitting film layer; 506, magneto-optical material; 507, partial reflection mirror; 508, filter; 510, glass tube; 511, heat sink; 512, outer sealing steel tube; 700, synchronization signal light. DETAILED DESCRIPTION

[0057] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0058] First aspect

[0059] refer to Figure 2 A highly integrated laser radar light source comprises a seed light source 10 and a first pump light source 20; the seed light source 10 and the first pump light source are connected to the input port of the input end integrator 30; one end of an active optical fiber 40 is connected to the output end of the input end integrator 30, and the other end is connected to the input port of the output end integrator 50;

[0060] The first isolator 71 of the input end integrator 30 isolates the seed light source 10 and the active optical fiber 40, so as to prevent the amplifier from generating self-oscillation;

[0061] The input end integrator 30 combines the pump light 200 generated by the first pump light source 20 into the active optical fiber 40 through a wave combining function;

[0062] The seed light source 10 generates a first signal light 100;

[0063] The first pump light source 20 provides energy for the active optical fiber 40;

[0064] The active optical fiber 40 absorbs the pump light of the first pump light source 20 and amplifies the first signal light 100 of the seed light source 10;

[0065] The output end integrator 50 isolates the output end of the output end integrator 50 and the active optical fiber 40 through the second isolator 72, which can prevent the amplified signal light from generating self-excited oscillation in the amplifier, isolate the pump light 200 in the active optical fiber 40, and output the second signal light 500, that is, the output end integrator 50 outputs the second signal light 500 through the output end of the output end integrator 50 through the wavelength splitting function, and returns the pump light 200 to the active optical fiber 40;

[0066] The output end integrator 50 reflects the stray light generated by the active optical fiber 40 out of the optical path through the notch function;

[0067] The second photodiode 62 is used to detect and monitor the second signal light 500 and provide a synchronization signal. Figure 8 As shown in the figure, other figures do not show, the output method is the same as Figure 8 The synchronization signal light 700 is output through the sixth optical fiber 96 .

[0068] In an implementation manner of the present invention, the monitoring function of the output end integrator 50 is used to monitor the second signal light 500 and provide a synchronization signal at the same time.

[0069] refer to Figure 4-5 In one embodiment of the utility model, the input end integrator 30 includes three optical fiber heads, a birefringent crystal shift plate, a wave plate, a lens, a magneto-optical material, a magnet ring, a partial reflector, a photodiode and a glass tube arranged in sequence along the optical path direction.

[0070] Figure 4-5 In the figure, 301 is a three-fiber head, 302 is a birefringent crystal shift plate, 303 is a wave plate, 304 is a lens, 305 is a lens wave-combining film layer, 306 is a magneto-optical material, 307 is a partial reflector, 308 is a magnet ring, and 309 is a glass tube.

[0071] In one embodiment of the utility model, the first optical fiber 91, the third optical fiber 93, the birefringent crystal shift plate, the wave plate, the lens, the magneto-optical material, the magnet ring and the partial reflector of the three-fiber head constitute the first isolator 71; the first optical fiber 91 of the three-fiber head is used to input the first signal light 100 generated by the seed light source 10, the second optical fiber 92 is used to input the pump light 200 generated by the first pump light source 20, and the third optical fiber 93 is used to output the light integrated by the input end integrator 30;

[0072] The first optical fiber 91, the second optical fiber 92, the third optical fiber 93 and the lens of the three-fiber head constitute an input end combiner of the pump light and the signal light;

[0073] The first optical fiber 91, the third optical fiber 93, the lens and the partial reflector of the three-fiber head constitute an input end optical splitter;

[0074] The first optical fiber 91, lens, partial reflector and photodiode of the three-fiber head constitute an input end detector.

[0075] refer to Figure 6 and 9 In one embodiment of the utility model, the output end integrator 50 includes a dual optical fiber head, a birefringent crystal shift plate, a wave plate, a lens, a magneto-optical material, a magnet ring, a heat sink, a notch filter, a partial reflector, a photodiode, a glass tube and an outer sealing steel tube arranged along the optical path.

[0076] Figure 6-9 In the figure, 501 is a dual optical fiber head, 502 is a birefringent crystal shift plate, 503 is a wave plate, 504 is a lens, 505 is a lens wave splitting film layer, 506 is a magneto-optical material, 507 is a partial reflector, 510 is a glass tube, 511 is a heat sink, and 512 is an outer sealing steel tube.

[0077] In one embodiment of the utility model, the fourth optical fiber 94, the fifth optical fiber 95 of the dual optical fiber head and the birefringent crystal shift plate, the wave plate, the lens, the magneto-optical material, the magnet ring, the notch filter and the partial reflector constitute an output end high-power isolator; the fourth optical fiber 94 of the dual optical fiber head is used to input the second signal light 500 and the pump light 200, and the fifth optical fiber 95 is used to output the amplified second signal light 500 demultiplexed by the output end integrator 50;

[0078] The fourth optical fiber 94, the fifth optical fiber 95 and the lens of the dual optical fiber head constitute an output end splitter of the pump light and the signal light;

[0079] The fourth optical fiber 94, the fifth optical fiber 95, the lens and the notch filter of the dual optical fiber head constitute a notch filter at the output end of stray light;

[0080] The fourth optical fiber 94, the fifth optical fiber 95, the lens and the partial reflector of the dual optical fiber head constitute an output end optical splitter;

[0081] The fourth optical fiber 94, lens, partial reflector and photodiode of the dual optical fiber head constitute an output end detector.

[0082] refer to Figure 7-8In one embodiment of the utility model, the output integrator 50 further includes a notch filter. If the output integrator 50 does not contain a TAP-PD, the notch filter is perpendicular to the optical path of the first signal light 100, the signal light returns to the optical path, and the stray light is transmitted out of the optical path; if the output integrator 50 contains a TAP-PD, the notch filter forms an acute angle with the optical path of the first signal light 100, the signal light continues to be transmitted, and the stray light is reflected out of the optical path. Figure 8 Schematic diagram of the output end integrator 50 of the notch filter emitting a synchronization signal light.

[0083] In one embodiment of the present invention, the active optical fiber 40 is an erbium-ytterbium double-clad optical fiber, the optical fiber used for inputting the first signal light 100 is a single-mode optical fiber, and the optical fiber used for inputting the pump light 200 is a multi-mode optical fiber.

[0084] In this embodiment, the first signal light 100 is coupled into the single-mode core of the Er-Yb double-clad optical fiber, and the pump light 200 is coupled into the multi-mode core of the Er-Yb double-clad optical fiber. The two independent processes of single-mode to single-mode coupling and multi-mode to multi-mode coupling can ensure the highest coupling efficiency, thus ensuring the low loss and high efficiency of the overall structure.

[0085] In a specific embodiment, the structure of the Er-Yb double-clad optical fiber is single-mode core / multi-mode core / cladding / coating, such as 10 / 105 / 125 / 250um, the structure of the multi-mode optical fiber of the input pump light 200 is core / cladding / coating, such as 105 / 125 / 250um, and the single-mode optical fiber core of the input first signal light 100 is 10um. At this time, after the first signal light 100 and the pump light 200 are coupled into the active optical fiber 40, the first signal light 100 is transmitted in the single-mode core, that is, within the range of 10um. The pump light is transmitted in the multi-mode core, that is, within the range of 105um. The first pump light source 20 used at this time can be a multi-mode 915 / 940 / 976nm pump source.

[0086] Second aspect

[0087] refer to Figure 3 A highly integrated laser radar light source comprises a seed light source 10 and a first pump light source 20; the seed light source 10 and the first pump light source 20 are connected to the input port of the input end integrator 30; one end of an active optical fiber 40 is connected to the output end of the input end integrator 30, and the other end is connected to the input port of the output end integrator 50, and the second pump light source 21 is connected to the other input port of the output end integrator 50;

[0088] The first isolator 71 of the input end integrator 30 isolates the seed light source 10 and the active optical fiber 40;

[0089] The input end integrator 30 combines the pump light 200 generated by the first pump light source 20 into the active optical fiber 40 through a wave combining function;

[0090] The seed light source 10 generates a first signal light 100;

[0091] The first pump light source 20 and the second pump light source 21 provide energy for the active optical fiber 40;

[0092] The active optical fiber 40 absorbs the pumping light of the first pumping light source 20 and the second pumping light source 21, and amplifies the first signal light 100 of the seed light source 10;

[0093] The output end integrator 50 isolates the output end of the output end integrator 50 and the active optical fiber 40 through the second isolator 72, isolates the pump light 200 in the active optical fiber 40, and outputs the second signal light 500, that is, the output end integrator 50 outputs the second signal light 500 through the output end of the output end integrator 50 through the wavelength splitting function, and returns the pump light 200 to the active optical fiber 40;

[0094] The output end integrator 50 reflects the stray light generated by the active optical fiber 40 out of the optical path through the notch function;

[0095] The second photodiode 62 is used for detecting and monitoring the second signal light 500 and providing a synchronization signal.

[0096] The difference from the first aspect is the structure of the output integrator. The output integrator 50 in this embodiment is basically the same as the input integrator 30, except that the direction of the isolator is different. A bidirectional pumped laser light source structure is formed and applied in higher power scenarios.

[0097] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure made using the contents of the specification and drawings of the present invention, or directly or indirectly used in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A highly integrated laser radar light source, characterized in that: The invention comprises a seed light source (10) and a first pump light source (20); the seed light source (10) and the first pump light source are connected to the input port of an input end integrator (30); one end of an active optical fiber (40) is connected to the output end of the input end integrator (30), and the other end is connected to the input port of an output end integrator (50); The first isolator (71) of the input end integrator (30) isolates the seed light source (10) and the active optical fiber (40); The input end integrator (30) synthesizes the pump light (200) generated by the first pump light source (20) into the active optical fiber (40); The seed light source (10) generates a first signal light (100); The first pump light source (20) provides energy for the active optical fiber (40); The active optical fiber (40) absorbs the pump light of the first pump light source (20) and amplifies the first signal light (100) of the seed light source (10); The output end integrator (50) isolates the output end of the output end integrator (50) and the active optical fiber (40) through a second isolator (72), isolates the pump light (200) in the active optical fiber (40), and outputs a second signal light (500), that is, the output end integrator (50) outputs the second signal light (500) through the output end of the output end integrator (50), and returns the pump light (200) to the active optical fiber (40); The output end integrator (50) reflects stray light generated by the active optical fiber (40) out of the optical path; The second photodiode (62) is used to detect and monitor the second signal light (500) and provide a synchronization signal at the same time.

2. The highly integrated laser radar light source according to claim 1, characterized in that: The output end integrator (50) is used to monitor the second signal light (500) and provide a synchronization signal at the same time.

3. The highly integrated laser radar light source according to claim 1, characterized in that: The input end integrator (30) comprises three optical fiber heads, a birefringent crystal shift plate, a wave plate, a lens, a magneto-optical material, a magnet ring, a partial reflector, a photodiode and a glass tube which are sequentially arranged along the optical path direction.

4. The highly integrated laser radar light source according to claim 3, characterized in that: The first optical fiber (91), the third optical fiber (93), the birefringent crystal shift plate, the wave plate, the lens, the magneto-optical material, the magnet ring and the partial reflector of the three-fiber head constitute the first isolator (71); the first optical fiber (91) of the three-fiber head is used to input the first signal light (100) generated by the seed light source (10), the second optical fiber (92) is used to input the pump light (200) generated by the first pump light source (20), and the third optical fiber (93) is used to output the light integrated by the input end integrator (30); The first optical fiber (91), the second optical fiber (92), the third optical fiber (93) and the lens of the three-fiber head constitute an input end combiner of pump light and signal light; The first optical fiber (91), the third optical fiber (93), the lens and the partial reflector of the three-fiber head constitute an input end optical splitter; The first optical fiber (91), lens, partial reflector and photodiode of the three-fiber head constitute an input end detector.

5. The highly integrated laser radar light source according to claim 1, characterized in that: The output end integrator (50) comprises a double optical fiber head, a birefringent crystal displacement plate, a wave plate, a lens, a magneto-optical material, a magnet ring, a heat sink, a notch filter, a partial reflector, a photodiode, a glass tube and an outer sealing steel tube arranged along the optical path direction.

6. The highly integrated laser radar light source according to claim 5, characterized in that: The fourth optical fiber (94) and the fifth optical fiber (95) of the dual optical fiber head and the birefringent crystal shift plate, wave plate, lens, magneto-optical material, magnetic ring, notch filter and partial reflector constitute an output end high-power isolator; the fourth optical fiber (94) of the dual optical fiber head is used to input the second signal light (500) and the pump light (200), and the fifth optical fiber (95) is used to output the amplified second signal light (500) split by the output end integrator (50); The fourth optical fiber (94), the fifth optical fiber (95) and the lens of the dual optical fiber head constitute an output end splitter for the pump light and the signal light; The fourth optical fiber (94), the fifth optical fiber (95), the lens and the notch filter of the dual optical fiber head constitute a notch filter at the output end of stray light; The fourth optical fiber (94), the fifth optical fiber (95), the lens and the partial reflector of the dual optical fiber head constitute an output end optical splitter; The fourth optical fiber (94), lens, partial reflector and photodiode of the dual optical fiber head constitute an output end detector.

7. The highly integrated laser radar light source according to claim 1, characterized in that: The output-end integrator (50) further comprises a notch filter. If the output-end integrator (50) does not contain a TAP-PD, the notch filter is perpendicular to the optical path of the first signal light (100), the signal light returns to the optical path, and stray light is transmitted out of the optical path; if the output-end integrator (50) contains a TAP-PD, the notch filter forms an acute angle with the optical path of the first signal light (100), the signal light continues to be transmitted, and stray light is reflected out of the optical path.

8. The highly integrated laser radar light source according to claim 1, characterized in that: The active optical fiber (40) is an erbium-ytterbium double-clad optical fiber, the optical fiber used for inputting the first signal light (100) is a single-mode optical fiber, and the optical fiber used for inputting the pump light (200) is a multi-mode optical fiber.

9. A highly integrated laser radar light source, characterized in that: The invention comprises a seed light source (10) and a first pump light source (20); the seed light source (10) and the first pump light source (20) are connected to the input port of an input end integrator (30); one end of an active optical fiber (40) is connected to the output end of the input end integrator (30), and the other end is connected to the input port of an output end integrator (50); and a second pump light source (21) is connected to the other input port of the output end integrator (50); The first isolator (71) of the input end integrator (30) isolates the seed light source (10) and the active optical fiber (40); The input end integrator (30) synthesizes the pump light (200) generated by the first pump light source (20) into the active optical fiber (40); The seed light source (10) generates a first signal light (100); The first pump light source (20) and the second pump light source (21) provide energy for the active optical fiber (40); The active optical fiber (40) absorbs pump light from the first pump light source (20) and the second pump light source (21), and amplifies the first signal light (100) of the seed light source (10); The output end integrator (50) isolates the output end of the output end integrator (50) and the active optical fiber (40) through a second isolator (72), isolates the pump light (200) in the active optical fiber (40), and outputs a second signal light (500), that is, the output end integrator (50) outputs the second signal light (500) through the output end of the output end integrator (50), and returns the pump light (200) to the active optical fiber (40); The output end integrator (50) reflects stray light generated by the active optical fiber (40) out of the optical path; The second photodiode (62) is used to detect and monitor the second signal light (500) and provide a synchronization signal at the same time.

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