CN208705508U

CN208705508U - It is a kind of to polarize unrelated Amici prism structure

Info

Publication number: CN208705508U
Application number: CN201821206962.2U
Authority: CN
Inventors: 凌吉武; 黄武达; 黄磊; 周明强
Original assignee: Fuzhou Haichuang Optical Co Ltd
Current assignee: Fujian Haichuang Photoelectric Technology Co.,Ltd.
Priority date: 2018-07-27
Filing date: 2018-07-27
Publication date: 2019-04-05
Anticipated expiration: 2028-07-27

Abstract

The utility model discloses a kind of unrelated Amici prism structures of polarization, including the first PBS prism being set in sequence along optical path, half-wave plate and the 2nd PBS prism, half-wave plate is that rotation is set between the first PBS prism and the 2nd PBS prism, the first polarization beam splitter for being divide into upper part and lower part its exit facet is equipped in first PBS prism, the second polarization beam splitter for being divide into upper part and lower part its plane of incidence is equipped in 2nd PBS prism, the upper surface of first PBS prism and the lower end surface of the 2nd PBS prism, which are plated, is equipped with high-reflecting film, the half-wave plate being set between the first PBS prism and the 2nd PBS prism is set as rotationally form by ingenious property, allow to pass through rotatable halfwave plate, its optical axis is enabled to shift, so that it is unrelated to be divided into required polarization by the signal light of half-wave plate , fixed splitting ratio two-beam, enable the structure that any splitting ratio requirement may be implemented, it is also ultralow with PDL and reduce the technical effect of the plated film difficulty of NPBS, make it have good market application prospect.

Description

It is a kind of to polarize unrelated Amici prism structure

Technical field

The utility model relates to optical device fields, especially a kind of to polarize unrelated Amici prism structure.

Background technique

In existing optical device, it is desirable to if being divided a branch of signal light in any proportion, need by means of multiple Miscellaneous optics fit structure, causes device structure to be difficult to densification and higher cost.

Summary of the invention

That the purpose of this utility model is to provide a kind of structures is simple, compact, operates conveniently and can be realized any light splitting Amici prism structure more unrelated than the polarization of requirement.

In order to realize above-mentioned technical purpose, the technical solution adopted in the utility model are as follows:

The unrelated Amici prism structure of a kind of polarization comprising the first PBS prism that is set in sequence along optical path, half-wave plate and the Two PBS prisms, the half-wave plate are that rotation is set between the first PBS prism and the 2nd PBS prism, the first PBS rib It is equipped with the first polarization beam splitter for being divide into upper part and lower part its exit facet in mirror, is equipped in the 2nd PBS prism by it The second polarization beam splitter that the plane of incidence is divide into upper part and lower part, under the upper surface and the 2nd PBS prism of the first PBS prism End face, which is plated, is equipped with high-reflecting film.

Wherein, the specification or physical index of the first PBS prism and the 2nd PBS prism are consistent.

It is preferably implemented as one of which, further, the upper surface plating of the 2nd PBS prism is equipped with anti-reflection film.

As a kind of preferred implementation is enabled, further, second polarization beam splitter is also by the exit facet of the 2nd PBS prism It is divide into upper part and lower part, the upper surface plating of the 2nd PBS prism is equipped with high-reflecting film.

Preferably, the plane of incidence of the first PBS prism is also divide into upper part and lower part by first polarization beam splitter.

Preferably, the lower end surface of the first PBS prism, which is also plated, is equipped with high-reflecting film.

A kind of power monitor comprising the unrelated Amici prism structure of polarization described above.

A kind of comb filter comprising the unrelated Amici prism structure of polarization described above.

Using above-mentioned technical solution, the utility model compared to the prior art, is had the beneficial effect that practical It is novel that the half-wave plate being set between the first PBS prism and the 2nd PBS prism is set as by rotationally form by ingenious property, Allow to enable its optical axis shift by rotatable halfwave plate, so that the signal light by half-wave plate can be divided into The two-beam of unrelated, the fixed splitting ratio of required polarization, and the shape that can be adjusted in real time can be set into the scheme of rotation of the structure Formula, enabling the utility model polarize unrelated Amici prism structure may be implemented any splitting ratio requirement, and its also have PDL ultralow and The technical effect for reducing the plated film difficulty of NPBS, makes it have good market application prospect.

Detailed description of the invention

The utility model is further elaborated with reference to the accompanying drawings and detailed description:

Fig. 1 is one of the brief implementation structure and optical path of the utility model embodiment 1 schematic diagram；

Fig. 2 is the brief implementation structure of the utility model embodiment 2 and the schematic diagram of one of optical path.

Specific embodiment

Embodiment 1

The present embodiment includes the first PBS prism 1, half-wave plate 2 and the 2nd PBS prism 3 being set in sequence along optical path, described Half-wave plate 2 is that rotation is set between the first PBS prism 1 and the 2nd PBS prism 3, is equipped in the first PBS prism 1 by it Its plane of incidence is divided by the first polarization beam splitter 11 that exit facet is divide into upper part and lower part, interior be equipped with of the 2nd PBS prism 3 Upper and lower two-part second polarization beam splitter 31, the upper surface of the first PBS prism 1 and the lower end surface of the 2nd PBS prism 3 are equal Plating is equipped with high-reflecting film, and the upper surface plating of the 2nd PBS prism 3 is equipped with anti-reflection film.

Wherein, the rotation setting of half-wave plate 2 can carry out driving or on the outside face by the connector of a translator It is arranged the connector sleeve with external gear and engages driving with motor again.

When signal light is injected from the plane of incidence of the first PBS prism 1, divided by the first polarization beam splitter 11 for P light (mixed with few Measure S light) and S light (mixed with a small amount of P light), S light by the first polarization beam splitter 11 reflexes to the upper surface of the first PBS prism and secondary It reflects and is simultaneously projected from the first PBS prism 1, then inject half-wave plate 2 again, P light passes through the first polarization beam splitter 11, then projects the One PBS prism 1 enters half-wave plate 2, the optical axis of half-wave plate 2 can be made to move by rotatable halfwave plate 2 at this time, enable into Partial polarization occurs for the S light and P light entered to half-wave plate 2, make in P light and S light mixed with S light or the energy proportion of P light change Become, two-beam is made to become P+S light, it is then incident from the plane of incidence upper and lower part of the 2nd PBS prism 3 respectively, from the 2nd PBS rib The light of 3 top of mirror incidence is divided by the second polarization beam splitter 31, so that major part S light is reflected, then from the 2nd PBS prism 3 Upper surface project, mixed with P light through the second polarization beam splitter 31 from its exit facet project, from 3 lower part of the 2nd PBS prism Incident light is entered the second polarization beam splitter 31 and is divided, make by after the high-reflecting film reflection of 3 lower end surface of the 2nd PBS prism Most of S light reflected, then from the exit facet of the 2nd PBS prism 3 project, mixed with P light penetrate the second polarization spectro Film 31 and from end face thereon project.

Using the exit facet of the 2nd PBS prism 3 as port A, received energy is Ea, and the upper surface of the 2nd PBS prism is Port B, received energy is Eb, then its splitting ratio is Ea/Eb.

Embodiment 2

The present embodiment is roughly the same with embodiment 1, the difference is that, the second polarization beam splitter 31 is also by the 2nd PBS The exit facet of prism 3 is divide into upper part and lower part, and the upper surface plating of the 2nd PBS prism 3 is equipped with high-reflecting film；First polarization beam splitter 11 Also the plane of incidence of the first PBS prism 1 is divide into upper part and lower part；The lower end surface of first PBS prism 1, which is also plated, is equipped with high-reflecting film.

When signal light is injected from the plane of incidence top of the first PBS prism 1, is divided by the first polarization beam splitter 11 and (mixed for P light Have a small amount of S light) and S light (mixed with a small amount of P light), S light is reflexed to the upper surface of the first PBS prism 1 by the first polarization beam splitter 11 And projected in secondary reflection and from the first PBS prism 1, half-wave plate 2 is then injected again, and P light passes through the first polarization beam splitter 11, then It projects the first PBS prism 1 and enters half-wave plate 2, the optical axis of half-wave plate 2 can be made to move by rotatable halfwave plate 2 at this time It is dynamic, enable the S light for entering half-wave plate 2 and P light that partial polarization occurs, make in P light and S light mixed with S light or P light energy proportion It changes, two-beam is made to become P+S light, it is then incident from the plane of incidence upper and lower part of the 2nd PBS prism 3 respectively, from the The light of two PBS prisms, 3 top incidence is divided by the second polarization beam splitter 31, so that major part S light is reflected, then again by second On the upper surface of PBS prism 3 high-reflecting film reflection, finally from the exit facet top of the 2nd PBS prism 3 project, mixed with P light It is projected through the second polarization beam splitter 31 from its exit facet lower part, from the light of 3 lower part of the 2nd PBS prism incidence by the 2nd PBS rib After the high-reflecting film reflection of 3 lower end surface of mirror, enters the second polarization beam splitter 31 and be divided, so that major part S light is reflected, so Projected afterwards from the exit facet lower part of the 2nd PBS prism 3, mixed with P light through the second polarization beam splitter 31 and by end face thereon High-reflecting film reflection after, from the exit facet top of the 2nd PBS prism 3 project.

The above is the embodiments of the present invention, for the ordinary skill in the art, practical according to this Novel introduction is descended to the mortal world in the situation for not departing from the principles of the present invention and spirit according to present utility model application the scope of the patents institute Equivalent change, modification, the replacement and variant made, should all belong to the covering scope of the utility model.

Claims

1. a kind of unrelated Amici prism structure of polarization, it is characterised in that: it include the first PBS prism being set in sequence along optical path, Half-wave plate and the 2nd PBS prism, the half-wave plate is that rotation is set between the first PBS prism and the 2nd PBS prism, described The first polarization beam splitter for being divide into upper part and lower part its exit facet is equipped in first PBS prism, in the 2nd PBS prism Equipped with the second polarization beam splitter for being divide into upper part and lower part its plane of incidence, the upper surface of the first PBS prism and the 2nd PBS The lower end surface of prism, which is plated, is equipped with high-reflecting film.

2. a kind of unrelated Amici prism structure of polarization according to claim 1, it is characterised in that: the 2nd PBS prism Upper surface plating be equipped with anti-reflection film.

3. a kind of unrelated Amici prism structure of polarization according to claim 1, it is characterised in that: second polarization point The exit facet of 2nd PBS prism is also divide into upper part and lower part by light film, and the upper surface plating of the 2nd PBS prism is equipped with high-reflecting film.

4. a kind of unrelated Amici prism structure of polarization according to claim 3, it is characterised in that: first polarization point The plane of incidence of first PBS prism is also divide into upper part and lower part by light film.

5. a kind of unrelated Amici prism structure of polarization according to claim 4, it is characterised in that: under the first PBS prism End face, which is also plated, is equipped with high-reflecting film.