Transmitting TO-CAN

Abstract

The utility model relates to an emission TO-CAN, which comprises a laser chip made of indium phosphide, and a light-emitting strip waveguide on the laser chip is inclined by 3.17 degrees; the laser chip is inclined by 11 degrees and fixed on the base, the forward light of the laser chip is emitted vertically at 0 degree and upwards, and the backlight of the laser chip is emitted vertically at 0 degree and downwards into the MPD fixed on the horizontal plane of the base. The MPD has the advantages that through the design, an inclined plane groove inclining by 11 degrees does not need to be formed in the base, the MPD can be fixed to the horizontal plane of the base, the structure of the base can be effectively simplified, the optical performance can be guaranteed, meanwhile, reflection of forward light can be optimized (mainly from reflection of a lens, an optical fiber and the like), and the stability of the MPD is improved. And the base machining problem is solved, and the MPD fixing and gold wire bonding yield is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of optical communication, in particular to a transmitting TO-CAN. Background Art

[0002] Common transmitters TO-CAN such as Figure 1 and Figure 2 As shown, the light strip waveguide of the laser chip used is straight. In order to prevent the reflected light of the MPD (MPD is the detector monitoring the backlight) from being vertically reflected back to the back of the laser chip and causing a decrease in light performance, a 11° bevel groove is usually designed on the base, and the MPD is fixed at the bottom of the bevel groove, so that there is an 11° angle between the MPD and the laser chip, so that the reflected light cannot return along the original path, ensuring good light performance. However, opening a 11° bevel groove on the base will not only increase the difficulty of base processing, but also increase the difficulty of MPD patch and gold wire bonding, resulting in low yield. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a transmitting TO-CAN to overcome the deficiencies in the above-mentioned prior art.

[0004] The technical solution of the utility model to solve the above technical problems is as follows:

[0005] A transmitting TO-CAN comprises: a laser chip made of indium phosphide, a light-emitting strip waveguide on the laser chip tilted at 3.17°; the laser chip tilted at 11° and fixed on a base, its forward light is emitted vertically at 0° upward, and its backlight is emitted vertically at 0° downward into an MPD fixed on the horizontal plane of the base.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, a boss is provided on the base, and the laser chip is fixed on the side of the boss in a patch manner at an angle of 11 degrees.

[0008] Furthermore, the MPD is fixed on the horizontal plane of the base in a patch manner.

[0009] Furthermore, a tube cap for packaging the laser chip and the MPD is fixed on the base, and a lens coupled with the forward light output of the laser chip is provided on the top of the tube cap.

[0010] The beneficial effect of the utility model is that through this design, there is no need to open a bevel groove with an inclination of 11° on the base, and the MPD can be fixed on the horizontal plane of the base, which can not only effectively simplify the base structure, but also ensure the optical performance. At the same time, the reflection of forward light can also be optimized (mainly from the reflection of lenses, optical fibers, etc.), and the base processing problem and the MPD patch and gold wire bonding yield are also solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is the main view of launching TO-CAN in the prior art;

[0012] Figure 2 It is a side view of a TO-CAN transmitter in the prior art;

[0013] Figure 3 This is the front view of the TO-CAN transmitter in the utility model;

[0014] Figure 4 It is a side view of the TO-CAN transmitter in the utility model;

[0015] Figure 5 This is a structural diagram of the laser chip in the utility model.

[0016] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0017] 1. Laser chip, 110, light strip waveguide, 2. Base, 210, boss, 3. MPD, 4. Cap, 5. Lens. DETAILED DESCRIPTION

[0018] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0019] Example 1

[0020] like Figure 3 , Figure 4 , Figure 5 As shown, a transmitting TO-CAN includes: a laser chip 1 made of indium phosphide, a light-emitting strip waveguide 110 on the laser chip 1 tilted at 3.17°, the laser chip 1 tilted at 11° and fixed on a base 2, an MPD3 fixed on the horizontal plane of the base 2, and since sin3.17°×3.45=sin11°×1, where 3.45 is the refractive index of indium phosphide and 1 is the refractive index of air, the forward light of the laser chip 1 is emitted vertically at 0° upward, and the backlight of the laser chip 1 is emitted vertically at 0° downward into the MPD3 fixed on the horizontal plane of the base 2;

[0021] With this design, there is no need to open a 11° inclined groove on the base 2, and the MPD 3 can be fixed on the horizontal plane of the base 2. This not only effectively simplifies the structure of the base 2, but also ensures the optical performance. At the same time, the reflection of the forward light can also be optimized (mainly from the reflection of the lens, optical fiber, etc.), and the base processing problems and the fixation of the MPD and the gold wire bonding yield are also solved.

[0022] Since the mainstream material of the laser chip 1 is indium phosphide, the inclination degree of the light strip waveguide 110 and the inclination degree of the laser chip 1 are specific design values. If the material of the laser chip 1 changes, then sinX°×n=sinY°×1 should be satisfied, wherein X is the inclination degree of the light strip waveguide 110, Y is the inclination degree of the laser chip 1, and n is the refractive index of the material selected for the laser chip 1.

[0023] Example 2

[0024] like Figure 3 , Figure 4 As shown, this embodiment is a further improvement on the basis of embodiment 1, and the details are as follows:

[0025] The base 2 has a boss 210 , the laser chip 1 is fixed on the side of the boss 210 in a patch manner at an angle of 11°, and the MPD 3 is fixed on the horizontal surface of the base 2 in a patch manner.

[0026] The base 2 is fixed with a cap 4 encapsulating the laser chip 1 and the MPD 3 . A lens 5 coupled to the forward light emitted by the laser chip 1 is disposed on the top of the cap 4 . That is, the forward light emitted by the laser chip 1 is emitted after passing through the lens 5 .

[0027] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A transmitting TO-CAN, characterized in that: include: A laser chip (1) made of indium phosphide, a light strip waveguide (110) on the laser chip (1) tilted at 3.17 degrees; the laser chip (1) is fixed on a base (2) tilted at 11 degrees, its forward light is emitted vertically at 0 degrees upward, and its backlight is emitted vertically at 0 degrees downward into an MPD (3) fixed on the horizontal plane of the base (2).

2. A transmitting TO-CAN according to claim 1, characterized in that: The base (2) is provided with a boss (210), and the laser chip (1) is fixed on the side of the boss (210) in a patch manner at an angle of 11 degrees.

3. A transmitting TO-CAN according to claim 1, characterized in that: The MPD (3) is fixed on the horizontal plane of the base (2) in a patch manner.

4. A transmitting TO-CAN according to claim 1, characterized in that: A tube cap (4) for packaging the laser chip (1) and the MPD (3) is fixed on the base (2), and a lens (5) coupled to the forward light output of the laser chip (1) is provided on the top of the tube cap (4).

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