CN212933059U - Novel parallel light BOSA subassembly - Google Patents

Abstract

The utility model provides a novel parallel light BOSA subassembly, include: a transmitting end; the first lens is arranged on one side of the transmitting end; the flat window tube cap is arranged on one side, far away from the emission end, of the first lens; the isolator is arranged on one side, away from the first lens, of the flat window tube cap; the 45-degree wave plate is obliquely arranged on one side of the isolator, which is far away from the flat window pipe cap; the second lens is arranged on one side of the 45-degree wave plate away from the isolator; the receiving end is arranged beside the 45-degree wave plate; the light beam emitted by the emitting end sequentially passes through the first lens, the flat window tube cap, the isolator, the 45-degree wave plate and the second lens. The utility model discloses structural design is ingenious, has realized that the light beam focus is controllable, and has reduced the overall length tolerance of BOSA subassembly, has reduced manufacturing cost and has reduced power loss.

Description

Novel parallel light BOSA subassembly

Technical Field

The utility model relates to a BOSA subassembly field, more specifically the says so, relates to a novel parallel light BOSA subassembly.

Background

With the continuous development of the optical communication technology and the continuous progress of the optical application field, the requirements on the luminous intensity of an optical signal on an RFOG simulation product are higher and higher, and the requirements on the corresponding bandwidth of a receiving end are also higher and higher. It is well known to use a 45 ° splitter on an RFOG-tx BOSA package to separate the wavelength of the transmitted signal 1610nm from the wavelength of the received signal 1550 nm. However, the conventional BOSA assembly has the problems of difficult control of the focal length of a light beam, large tolerance of the total length and large power loss.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel parallel light BOSA subassembly for solve the difficult problem of accuse, the total length tolerance is big and power loss is big of light beam focus.

Compared with the prior art, the utility model discloses technical scheme and beneficial effect as follows:

a novel parallel light BOSA assembly comprising: a transmitting end; the first lens is arranged on one side of the transmitting end; the flat window tube cap is arranged on one side, far away from the emission end, of the first lens; the isolator is arranged on one side, away from the first lens, of the flat window tube cap; the 45-degree wave plate is obliquely arranged on one side of the isolator, which is far away from the flat window pipe cap; the second lens is arranged on one side of the 45-degree wave plate away from the isolator; the receiving end is arranged beside the 45-degree wave plate; the light beam emitted by the emitting end sequentially passes through the first lens, the flat window tube cap, the isolator, the 45-degree wave plate and the second lens.

As a further improvement, the receiving end further comprises a 0 ° wave plate arranged between the receiving end and the 45 ° wave plate.

As a further improvement, the method further comprises the following steps: the tube body is sleeved outside the transmitting end, and the first lens and the flat window tube cap are sequentially and fixedly arranged on the inner side of the tube body; the support is matched with the pipe body, and the isolator is fixedly arranged on the support; the square seat is matched with the support, and the 45-degree wave plate, the 0-degree wave plate and the receiving end are fixedly arranged on the square seat; and the adjusting ring is connected to one end, far away from the support, of the square base, and the second lens is fixedly arranged on the adjusting ring.

As a further improvement, an antireflection film is arranged on the mirror surface of the 45 ° wave plate close to the isolator, and a reflection film is arranged on the mirror surface of the 45 ° wave plate close to the second lens.

As a further improvement, an angle formed by the mirror surface of the 45 ° wave plate and the center line of the isolator is 45 °, an angle formed by the other mirror surface of the 45 ° wave plate and the center line of the second lens is 45 °, and an angle formed by the other mirror surface of the 45 ° wave plate and the center line of the receiving end is 45 °.

As a further improvement, the flat window tube cap is a TO-CAN tube cap with parallel flat glass.

As a further improvement, the first lens is a collimating lens.

As a further improvement, the second lens is a C-lens.

As a further improvement, the second lens is a G-lens.

The utility model has the advantages that: the first lens is arranged close TO the transmitting terminal TO-CAN, so that light spots of a light beam entering the isolator are small, and the use cost of the isolator is reduced; by adopting the combination of the first lens, the isolator, the 45-degree wave plate and the second lens, the light rays emitted by the emission end TO-CAN finally irradiate the end face of the second lens in a parallel light mode, the controllability of the focal length of the light beams is realized, the total length tolerance of the BOSA component is reduced, the production cost is reduced, and the power loss is reduced.

Drawings

Fig. 1 is a cross-sectional view of the overall structure of a BOSA assembly according to an embodiment of the present invention.

Fig. 2 is an enlarged view of a partial sectional structure provided in an embodiment of the present invention.

In the figure: 1. transmittingend 2,first lens 3, flat window tube cap 4, isolator 5.45 degree wave plate

6.Second lens 7, receiving end 8.0degree wave plate 9,tube 10, support

11.Square base 12, regulatingring 13,tail fiber 14, LD chip

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to 2, a novel parallel light BOSA assembly includes: atransmitting terminal 1; afirst lens 2 arranged on one side of the emittingend 1; the flatwindow tube cap 3 is arranged on one side of thefirst lens 2, which is far away from the emittingend 1; the isolator 4 is arranged on one side, away from thefirst lens 2, of the flatwindow tube cap 3; the 45-degree wave plate 5 is obliquely arranged on one side, away from the flatwindow tube cap 3, of the isolator 4; asecond lens 6 arranged on the side of the 45 °wave plate 5 away from the isolator 4; and a receivingend 7 arranged beside the 45-degree wave plate 5; the light beam emitted by the emittingend 1 sequentially passes through thefirst lens 2, the flatwindow tube cap 3, the isolator 4, the 45-degree wave plate 5 and thesecond lens 6. Thefirst lens 2 is arranged close to the transmittingend 1, so that light spots of the transmitted light beams entering the isolator 4 are small, and the use cost of the isolator 4 is reduced; by adopting the combination of thefirst lens 2, the isolator 4, the 45-degree wave plate 5 and thesecond lens 6, the light rays emitted by the emittingend 1 finally irradiate the end face of thesecond lens 6 in the form of parallel light, the controllability of the focal length of the light beams is realized, the total length tolerance of the BOSA component is reduced, the production cost is reduced, and the power loss is reduced.

Referring to fig. 1, the novel parallel light BOSA module further includes a 0 °wave plate 8 disposed between the receivingend 7 and the 45 °wave plate 5.

Referring to fig. 1, a novel parallel light BOSA assembly further includes: thetube body 9 is sleeved outside the transmittingend 1, and thefirst lens 2 and the flatwindow tube cap 3 are fixedly arranged on the inner side of thetube body 9 from left to right in sequence; asupport 10, which is matched with thepipe body 9, wherein the isolator 4 is fixedly arranged on thesupport 10; thesquare seat 11 is matched with thesupport 10, and the 45-degree wave plate 5, the 0-degree wave plate 8 and the receivingend 7 are all fixedly arranged on thesquare seat 11; and an adjustingring 12 connected to an end of thesquare base 11 away from thesupport 10, wherein thesecond lens 6 is fixedly disposed on the adjustingring 12.

An antireflection film is arranged on the mirror surface of the 45-degree wave plate 5 close to one side of the isolator 4, and a reflection film is arranged on the mirror surface of the 45-degree wave plate 5 close to one side of thesecond lens 6.

Referring to fig. 2, an angle formed by the mirror surface of the 45 °wave plate 5 and the center line of the isolator 4 is 45 °, an angle formed by the other mirror surface of the 45 °wave plate 5 and the center line of thesecond lens 6 is 45 °, and an angle formed by the other mirror surface of the 45 °wave plate 5 and the center line of thereceiving end 7 is 45 °.

Referring TO fig. 1, the flat-window cap 3 is a TO-CAN cap with parallel plate glass, the curvature of both surfaces is + ∞, and the refractive index of the lens is 1.45-1.62. The arrangement of the flatwindow pipe cap 3 improves the air tightness of the transmittingterminal 1, and further improves the practicability of the BOSA component.

Thefirst lens 2 is a collimating lens. The positive lens can be a spherical positive lens or an aspheric positive lens with double convex, plano-convex or meniscus shape, the material is a glass lens or a silicon lens, and the refractive index is 1.45-3.6. Referring to fig. 1, in the present embodiment, thefirst lens 2 is a plano-convex aspheric lens.First lens 2 is close toemission end 1 sets up, and the emission beam enters into the flatwindow tube cap 3 with the form of parallel light through the twice refraction offirst lens 2, because the setting offirst lens 2, has realized that the facula that gets into the emission beam of isolator 4 is little for can choose for use isolator 4 that the size is little, greatly reduced the overall cost of BOSA subassembly.

Thesecond lens 6 is a C-lens or a G-lens. Referring to fig. 1, in the present embodiment, thesecond lens 6 is a C-lens.

The utility model provides a pair of novel parallel light BOSA subassembly's theory of operation does:

theLD chip 14 of the transmittingend 1 emits a light beam, and since thefirst lens 2 is a convex flat lens, the light beam is refracted twice by thefirst lens 2, and the light beam is refracted into parallel light by dispersed light; the light beam passes through the straight projection of the flatwindow tube cap 3, and then enters the isolator 4, and the light beam is not refracted in the isolator 4; the light beam is refracted twice by the inclined 45-degree wave plate 5 and finally irradiates the end face of thesecond lens 6 in the form of parallel light, and the light beam is refracted by thesecond lens 6 and is focused on the fiber end face of thetail fiber 13, so that most of the light beam emitted from the emittingend 1 can finally enter the fiber core of thetail fiber 13;

when the light beam in thetail fiber 13 is recovered, the recovered light beam passes through thesecond lens 6 from thetail fiber 13 and is emitted to the reflecting surface of the 45-degree wave plate 5 in the form of parallel light, and because the reflecting surface of the 45-degree wave plate 5 is provided with the reflecting film, the light beam enters the 0-degree wave plate 8 after being reflected by the 45-degree wave plate 5 and finally enters thereceiving end 7; if some of the recycling beams are refracted through the 45 °wave plate 5, the recycling beams refracted through the 45 °wave plate 5 are all isolated by the isolator 4 due to the arrangement of the isolator 4, so that the recycling beams do not affect thetransmitting terminal 1.

The working principle, working process and the like of the present embodiment can refer to the corresponding contents of the foregoing embodiments.

The same or similar parts in the above embodiments in this specification may be referred to each other, and each embodiment is described with emphasis on differences from other embodiments, but the differences are not limited to be replaced or superimposed with each other.

The above examples are only for illustrating the technical solutions of the present invention and not for limiting the same. It will be understood by those skilled in the art that any modification and equivalent arrangement that do not depart from the spirit and scope of the invention should fall within the scope of the claims of the invention.

Claims (9)

1. A novel parallel light BOSA subassembly characterized in that includes:

a transmitting end;

the first lens is arranged on one side of the transmitting end;

the flat window tube cap is arranged on one side, far away from the emission end, of the first lens;

the isolator is arranged on one side, away from the first lens, of the flat window tube cap;

the 45-degree wave plate is obliquely arranged on one side of the isolator, which is far away from the flat window pipe cap;

the second lens is arranged on one side of the 45-degree wave plate away from the isolator; and

the receiving end is arranged beside the 45-degree wave plate;

the light beam emitted by the emitting end sequentially passes through the first lens, the flat window tube cap, the isolator, the 45-degree wave plate and the second lens.

2. The BOSA assembly according to claim 1, further comprising a 0 ° wave plate disposed between the receiving end and the 45 ° wave plate.

3. The BOSA assembly according to claim 2, further comprising:

the tube body is sleeved outside the transmitting end, and the first lens and the flat window tube cap are sequentially and fixedly arranged on the inner side of the tube body;

the support is matched with the pipe body, and the isolator is fixedly arranged on the support;

the square seat is matched with the support, and the 45-degree wave plate, the 0-degree wave plate and the receiving end are fixedly arranged on the square seat; and

the adjusting ring is connected to one end, far away from the support, of the square base, and the second lens is fixedly arranged on the adjusting ring.

4. The BOSA assembly according to claim 1, wherein an antireflection film is disposed on a mirror surface of the 45 ° wave plate on a side close to the isolator, and a reflection film is disposed on a mirror surface of the 45 ° wave plate on a side close to the second lens.

5. The BOSA assembly according to claim 1, wherein the 45 ° wave plate has a mirror surface forming an angle of 45 ° with the center line of the isolator, the 45 ° wave plate has another mirror surface forming an angle of 45 ° with the center line of the second lens, and the 45 ° wave plate has another mirror surface forming an angle of 45 ° with the center line of the receiving end.

6. The BOSA assembly according TO claim 1, wherein the flat-window cap is a TO-CAN cap with parallel plate glass.

7. The BOSA assembly according to claim 1, wherein the first lens is a collimating lens.

8. The BOSA assembly according to claim 1, wherein the second lens is a C-lens.

9. The BOSA assembly according to claim 1, wherein the second lens is a G-lens.

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