Optical module

Abstract

The utility model discloses an optical module. The optical module comprises a base; the optical module further comprises an insertion core fixing block which is arranged on the base, and the insertion core fixing block is in a hollow shape. The cover plate covers the top, far away from the base, of the insertion core fixing block, and an insertion groove is formed in the cover plate; the first optical element is a non-frame optical element, the first optical element is a replaceable element, and the first optical element can penetrate through the insertion groove to penetrate into the insertion core fixing block and is detachably arranged relative to the insertion core fixing block; and the second optical element is a frame optical element, and the second optical element is fixedly arranged in the insertion core fixing block and is matched with the inserted first optical element.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical technology field especially an optical module. BACKGROUND

[0002] Traditional optical devices, such as mirrors, lenses, polarizers, filters, etc., have fixed functions. For example, a small modular optical device experiment and test device disclosed in Chinese patent No. 202323188202.7 has multiple magnetic bases installed on the upper side of a breadboard, and an XY rotary platform, a Z-axis rotary table, a PD receiving table, and a laser platform are respectively installed on the upper ends of the multiple magnetic bases.

[0003] This device has clear and simple optical performance and usage of each module. However, if other functional devices are needed during experiments, they need to be prepared and purchased separately, which is inconvenient to use. INVENTION CONTENTS

[0004] The utility model solves the technical problem of the prior art, provides an optical module, and realizes function reconfiguration on a small-sized module, reduces cost, and improves flexibility.

[0005] The utility model solves the technical problem by adopting the following technical scheme: an optical module comprises a base, characterized by:

[0006] The optical module further comprises:

[0007] A ferrule fixing block is arranged above the base, and the ferrule fixing block is hollow.

[0008] A cover plate is arranged on the top of the ferrule fixing block away from the base, and the cover plate is provided with a slot.

[0009] A first optical element is a non-frame optical element, the first optical element is a replaceable element, the first optical element can pass through the slot and enter the ferrule fixing block, and the first optical element is detachably arranged relative to the ferrule fixing block; and

[0010] A second optical element is a frame optical element, and the second optical element is fixedly arranged in the ferrule fixing block and cooperates with the inserted first optical element.

[0011] Therefore, on the small-sized optical module, the detachable connection of the replaceable first optical element and the ferrule fixing block can select appropriate first optical elements and second optical elements according to needs to cooperate, so as to realize the functions that the second optical element cannot realize, realize function reconfiguration, reduce cost, and improve flexibility.

[0012] Preferably, the ferrule fixing block is open at the top away from the base, and the cover plate covers the opening at the top of the ferrule fixing block.

[0013] Preferably, the cover plate and the ferrule fixing block are detachably connected.

[0014] To facilitate the installation of the first optical element, the optical module further comprises a pressing block, the first optical element is detachably connected with the pressing block, and the pressing block abuts against the top surface of the cover plate.

[0015] Preferably, the cross section of the ferrule fixing block is annular rectangular, the shape of the cover plate corresponds to the ferrule fixing block, each side edge of the cover plate is respectively provided with one insertion slot or at least two insertion slots arranged at intervals, and the first optical element is selectively inserted into one insertion slot.

[0016] Preferably, to improve versatility, the shapes and sizes of the insertion slots are the same, and the insertion slots on the same side are parallel to each other.

[0017] To facilitate the positioning of the polarization maintaining axis of the polarization maintaining optical fiber, the optical module further comprises an FC flange, the FC flange is arranged on the side surface of the ferrule fixing block, and the FC flange is provided with a sleeve extending into the ferrule fixing block.

[0018] Preferably, the first optical element is an un-biased collimator, and the un-biased collimator can be used to realize flexible switching of spatial light and fiber coupling.

[0019] Compared with the prior art, the optical module has the following advantages: in the optical module with small size, the detachable connection of the replaceable first optical element and the ferrule fixing block can be used to select appropriate first optical elements and second optical elements according to needs, so as to realize the functions that cannot be realized by the second optical elements, reconstruct the functions, reduce the cost, and improve flexibility; and the un-biased collimator can be used to realize flexible switching of spatial light and fiber coupling. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A schematic view of the optical module of the embodiment of the utility model;

[0021] Figure 2 An exploded structural schematic view of the optical module of the embodiment of the utility model;

[0022] Figure 3 An exploded structural schematic view of the pressing block and the optical element of the optical module of the embodiment of the utility model;

[0023] Figure 4 A sectional view of the optical module of the embodiment of the utility model;

[0024] Figure 5A schematic view of one application example of the optical module of the embodiment of the present application (only a diagram of relevant devices is shown);

[0025] Figure 6 A schematic view of another application example of the optical module of the embodiment of the present application (only a diagram of relevant devices is shown);

[0026] Figure 7 A schematic view of another application example of the optical module of the embodiment of the present application (only a diagram of relevant devices is shown);

[0027] Figure 8 A schematic view of another application example of the optical module of the embodiment of the present application (only a diagram of relevant devices is shown);

[0028] Figure 9 A schematic view of another application example of the optical module of the embodiment of the present application (only a diagram of relevant devices is shown);

[0029] Figure 10 A schematic view of another application example of the optical module of the embodiment of the present application (only a diagram of relevant devices is shown). DETAILED DESCRIPTION

[0030] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, since the embodiments disclosed by the present application can be arranged in different directions, so these terms indicating the direction are only as an illustration and should not be regarded as a limitation, such as "upper", "lower" do not necessarily be limited to the direction opposite or consistent with the direction of gravity. In addition, the features defined as "first", "second" can explicitly or implicitly include one or more of the features.

[0032] Referring to Figures 1-4 An optical module can realize the reconstruction of device functions by increasing or decreasing optical elements.

[0033] Specifically, the optical module comprises a base 1, a ferrule fixing block 2 arranged on the base 1, and a cover plate 3 arranged on the top of the ferrule fixing block 2. The bottom of the ferrule fixing block 2 is open and is attached to the base 1, the top of the ferrule fixing block 2 is also open and is away from the base 1, the ferrule fixing block 2 is attached to the base 1, the cover plate 3 is arranged on the open top of the ferrule fixing block 2, and the cover plate 3 and the ferrule fixing block 2 can be detachably connected.

[0034] The ferrule fixing block 2 is a hollow structure, and the cross section thereof is preferably a ring-shaped rectangle, and more preferably a ring-shaped square. The shape of the cover plate 3 corresponds to that of the ferrule fixing block 2. The cover plate 3 is provided with a plurality of insertion grooves 31. In this embodiment, one insertion groove 31 or at least two insertion grooves 31 are arranged on each side edge of the cover plate 3, the insertion grooves 31 on adjacent sides are not interfered with or communicated with each other, the insertion grooves 31 on adjacent sides are perpendicular to each other, and the insertion grooves 31 on the same side are parallel to each other. The shapes and sizes of the insertion grooves 31 are the same.

[0035] The optical module further comprises a first optical element 41 and a second optical element 42. The first optical element 41 in the utility model is a non-frame optical element, and the second optical element 42 is a frame optical element. The so-called frame optical element refers to an element that affects the direction of the light path, such as reflection, refraction, etc. Such elements need to be fixed in advance, such as polarization beam splitters, mirrors, power beam splitters, etc. Non-frame optical elements such as wave plates, polarizing plates, and Faraday elements do not affect the direction of the light path, and thus do not affect the coupling efficiency. The functions of the module can be reconstructed by increasing or decreasing such optical elements. By increasing or decreasing different non-frame optical elements, various different functions can be achieved.

[0036] The first optical element 41 can pass through the insertion grooves 31 of the cover plate 3 from top to bottom and then enter the ferrule fixing block 2. The optical module further comprises a pressing block 5, the first optical element 41 is first fixed on the pressing block 5 (detachable connection), and after the two are locked, the first optical element 41 is inserted into the ferrule fixing block 2, and the pressing block 5 is tightly arranged on the top surface of the cover plate 3, and the pressing block 5 can be fixed with the cover plate 3 by fasteners.

[0037] The second optical element 42 is fixed in the ferrule fixing block 2.

[0038] The optical module further comprises an FC flange 6 arranged on each side of the ferrule fixing block 2, which facilitates the positioning of the polarization maintaining axis of the polarization maintaining optical fiber, and a sleeve 7 is arranged in the FC flange 6 to allow the optical fiber to pass in, the sleeve 7 extends into the ferrule fixing block 2, and the sleeve 7 can be a ceramic sleeve. The sleeves 7 on the opposite sides of the ferrule fixing block 2 are coaxially arranged, and the sleeves 7 on the adjacent sides of the ferrule fixing block 2 are perpendicular to each other, and can also be arranged according to the needs of the light path.

[0039] The optical module can be flexibly switched between fiber coupling and spatial light, one of the first optical elements 41 can be a collimator, in the case of not being inserted, it is spatial light output, and the spatial light can be interconnected between two modules, in the case of being inserted, it is fiber coupling output.

[0040] Referring to Figure 5 As an application example, the optical module is used as a polarizer, the second optical element 42 is a PBS (polarization beam splitter), and the first optical element 41 is a POL (polaroid), single-mode input light A1 passes through the PBS, and one of the split light beams passes through the POL to form a polarization maintaining output A2.

[0041] Referring to Figure 6 As an application example, the optical module is used as a beam combiner, the second optical element 42 is a PBS (polarization beam splitter), and the two polarization maintaining input lights B1 pass through the PBS to form a single-mode output light B2.

[0042] Referring to Figure 7 As an application example, the optical module is used as a variable-ratio beam splitter, the second optical element 42 is a PBS (polarization beam splitter), and the first optical element 41 is a HWQ (unpolarized collimator), the polarization maintaining input light C1 passes through the HWQ and the PBS, and the two split light beams form polarization maintaining outputs C2.

[0043] Referring to Figure 8 As an application example, the optical module is used as an isolator, the second optical element 42 is a PBS (polarization beam splitter), and the first optical element 41 is an ISO (isolation switch), the polarization maintaining input light D1 passes through the ISO and the PBS, and the split light beam forms a polarization maintaining output D2.

[0044] Referring to Figure 9 As an application example, the optical module is spliced in the form of a building block, such as a polarizer module (transferred to the next module in the form of spatial light to realize polarization beam splitting) and a beam combiner module (transferred to the next module in the form of fiber coupling to realize polarization beam combination) shown in Figure 5 Figure 7 ​The illustrated spectral ratio adjustable beam splitter. Similarly, several modules can be assembled according to different functional requirements, and then assembled on the same optical substrate. Double wedge angle functional components can be inserted between different optical modules to optimize coupling efficiency.

[0045] Similarly, referring to Figure 10 The optical module can also be expanded, with multiple second optical elements 42 (frame optical elements) pre-installed inside according to different functional requirements, to increase the functionality of the optical module and improve the flexibility of the system.

Claims

1. An optical module comprising a base (1); characterized in that: the optical module further comprises: a ferrule fixing block (2) disposed above the base (1), the ferrule fixing block (2) being hollow; a cover plate (3) covering the top of the ferrule fixing block (2) away from the base (1), the cover plate (3) being provided with a slot (31); a first optical element (41) being a non-frame optical element, the first optical element (41) being a replaceable element, the first optical element (41) being capable of penetrating into the ferrule fixing block (2) through the slot (31) and being detachably disposed relative to the ferrule fixing block (2); and a second optical element (42) being a frame optical element, the second optical element (42) being fixedly disposed in the ferrule fixing block (2) to cooperate with the inserted first optical element (41).

2. The optical module according to claim 1, characterized by: The top of the ferrule fixing block (2) away from the base (1) is open, and the cover plate (3) covers the opening at the top of the ferrule fixing block (2).

3. The optical module according to claim 2, characterized by: The cover plate (3) and the ferrule fixing block (2) are detachably connected.

4. The optical module according to claim 1, characterized by: The optical module further comprises a pressing block (5), the first optical element (41) being detachably connected with the pressing block (5), and the pressing block (5) abutting against the top surface of the cover plate (3).

5. The optical module according to claim 1, characterized by: The cross section of the ferrule fixing block (2) is a ring-shaped rectangle, the cover plate (3) corresponding to the ferrule fixing block (2) in shape, each side edge of the cover plate (3) being provided with one slot (31) or at least two slots (31) arranged at intervals towards the middle, and the first optical element (41) being selectively inserted into one of the slots (31).

6. The optical module according to claim 5, characterized by: The shapes and sizes of the slots (31) are the same, and the slots (31) on the same side are parallel to each other.

7. The optical module according to claim 1, characterized by: The optical module further comprises an FC flange (6) disposed on the side of the ferrule fixing block (2), the FC flange (6) being provided with a sleeve (7) extending into the ferrule fixing block (2).

8. The optical module according to any one of claims 1 to 7, characterized by: The first optical element (41) is an un-biased collimator.

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