CN207882497U

CN207882497U - A kind of optical device

Info

Publication number: CN207882497U
Application number: CN201820333472.2U
Authority: CN
Inventors: 闫翠翠; 刘志国
Original assignee: Dongguan Mentech Optical and Magnetic Co Ltd
Current assignee: Dongguan Mentech Optical and Magnetic Co Ltd
Priority date: 2018-03-12
Filing date: 2018-03-12
Publication date: 2018-09-18
Anticipated expiration: 2028-03-12

Abstract

The utility model discloses a kind of optical devices, including DFB aspheric lasers, it is pasted with carrier element on the pipe cap inner wall of the DFB aspheric laser, the carrier element is equipped with light hole, quarter wave plate is posted on the carrier element, the light that the DFB aspheric laser is sent out passes sequentially through pipe cap inner wall, light hole and quarter wave plate；The optical device further includes the EML lasers set gradually, optoisolator, the 2nd WDM optical filters, the first WDM optical filters and single mode optical fiber；Therefore, the optical device that the utility model embodiment provides, on the basis of making full use of optical path space to realize small-sized encapsulated, utilize the bit phase delay effect of quarter wave plate, make reflected light that 90 degree of rotations occur relative to the polarization state of incident light, it prevents reflected light from entering input path, to realize the isolation of original optical path return laser light device, improves antireflective property；Solve the problems, such as because optical device volume is too small can not install isolator light channel structure generate laser antireflective property it is poor.

Description

A kind of optical device

Technical field

The utility model is related to technical field of photo communication more particularly to a kind of optical devices.

Background technology

Current Optical Communication Market competition is more and more fierce, and the volume of communication device calls is smaller and smaller, therefore optical module Positive highly integrated small package development.

Existing long range or high rate optical device are all that the light that laser is sent out is coupled into optical fiber after isolator.By It is limited in the space of module miniaturization, it is desirable that the trend of optical device miniaturization is more and more urgent, and then no space is caused to be used for Place isolator.But the antireflective property of the light channel structure without isolator, laser is poor.

Utility model content

The purpose of this utility model is to provide a kind of optical devices, paste one in the pipe cap inner wall of DFB aspheric lasers The carrier element for posting quarter wave plate improves antireflection energy on the basis of making full use of optical path space to realize small-sized encapsulated Power.

For this purpose, the utility model uses following technical scheme：

A kind of optical device, including DFB aspheric lasers are pasted with carrier on the pipe cap inner wall of the DFB aspheric laser Element, the carrier element are equipped with light hole, quarter wave plate are posted on the carrier element, what the DFB aspheric laser was sent out Light passes sequentially through pipe cap inner wall, light hole and quarter wave plate.

Optionally, the wavelength for the light that the DFB aspheric laser is sent out is 1490nm.

Optionally, the optical device further includes the EML lasers set gradually, optoisolator, the 2nd WDM optical filters, One WDM optical filters and single mode optical fiber；

The first WMD optical filters and the 2nd WMD optical filters are mutually in that splayed is arranged.

Optionally, the wavelength for the light that the EML lasers are sent out is 1577nm.

Optionally, further include APD detectors for receiving the optical signal from the single mode optical fiber.

Optionally, the wavelength for the optical signal that the APD detectors receive is 1310nm.

The beneficial effects of the utility model：The optical device that the utility model embodiment provides, in the pipe of DFB aspheric lasers Cap inner wall pastes a carrier element for posting quarter wave plate, on the basis of making full use of optical path space to realize small-sized encapsulated, Using the bit phase delay effect of quarter wave plate, makes reflected light that 90 degree of rotations occur relative to the polarization state of incident light, prevent reflected light Into input path antireflective property is improved to realize the isolation of original optical path return laser light device.

Description of the drawings

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property It puts, can also be obtained according to these attached drawings other attached drawings.

Fig. 1 is the topology view of the DFB aspheric lasers for the optical device that the utility model embodiment provides.

Fig. 2 is the topology view for the optical device that the utility model embodiment provides.

It illustrates：

DFB aspheric laser 10；Carrier element 20；Quarter wave plate 30；EML lasers 40；APD detectors 50；Optoisolator 60；First WDM optical filters 70；2nd WDM optical filters 80；Single mode optical fiber 90.

Specific implementation mode

To enable the purpose of this utility model, feature, advantage more apparent and understandable, below in conjunction with this practicality Attached drawing in new embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that under The described embodiments are only a part of the embodiments of the utility model in face, and not all embodiment.Based on the utility model In embodiment, all other implementation obtained by those of ordinary skill in the art without making creative efforts Example, shall fall within the protection scope of the present invention.

Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.

Referring to FIG. 1, the optical device that the utility model embodiment provides includes DFB (Distributed Feedback Laser, distributed feedback laser) aspheric laser 10, carrier element is pasted on the pipe cap inner wall of DFB aspheric laser 10 20, carrier element 20 is equipped with light hole, posts quarter wave plate 30 on carrier element 20, the light that DFB aspheric laser 10 is sent out is successively Pass through pipe cap inner wall, light hole and quarter wave plate 30.

Wherein, it includes but not limited to glass, stainless steel or PEI that carrier element 20, which will have enough clear aperatures, material, (Polyetherimide, polyetherimide) etc..

Therefore, the optical device that the utility model embodiment provides realizes small-sized encapsulated making full use of optical path space On the basis of, using the bit phase delay effect of quarter wave plate 30, make reflected light that 90 degree of rotations occur relative to the polarization state of incident light, It prevents reflected light from entering input path, to realize the isolation of original optical path return laser light device, improves antireflective property；Solve because Optical device volume is too small and can not install the poor problem of the antireflective property for the laser that the light channel structure of isolator generates.

Referring to Fig. 2, the optical device that the utility model embodiment provides, specially a kind of 10G of high density SFP+ encapsulation EPON OLT optical devices are one for three-dimensional transmission single fiber, double light emission components, a light-receiving component and two wavelength-division multiplex The light transmit-receive integrated component that optical filter is formed, there is outstanding optoelectronic integration performance.

Specifically, the optical device further includes EML lasers 40 (Electroabsorption Modulated Laser), the optoisolator set gradually 60, the 2nd WDM (Wavelength Division Multiplexing, wavelength-division multiplex) optical filter 80, the first WDM optical filters 70 With single mode optical fiber 90.

First WMD optical filters 70 and the 2nd WMD optical filters 80 are mutually arranged in "eight" shape.

The light that EML lasers 40 are sent out passes sequentially through optoisolator 60 and the 2nd WDM optical filters 80, then with DFB aspheric The light that laser 10 is sent out merges into a branch of, and light beam after converging after the first WDM optical filters 70 along single mode optical fiber 90 by passing It is defeated.

Further, which further includes the APD (Avalanche for receiving the optical signal from single mode optical fiber Photo Diode, avalanche photodide) detector 50.

Specifically, the wavelength X 2 for the light that DFB aspheric laser 10 is sent out is equal to 1490nm, the light that EML lasers 40 are sent out Wavelength X 1 be equal to 1577nm, APD detectors 50 receive optical signal wavelength X 3 be equal to 1310nm.

Therefore, the optical device that the utility model embodiment provides, is the DFB that a pipe cap inner wall is posted to quarter wave plate 30 Aspheric laser 10 is applied in the 10G EPON OLT optical devices that SFP+ is encapsulated, using the bit phase delay effect of quarter wave plate 30, Make reflected light that 90 degree of rotations occur relative to the polarization state of incident light, prevents reflected light from entering input path, to realize former light The isolation of road return laser light device improves antireflective property, and at low cost；Solve because optical device volume is too small can not install every The poor problem of antireflective property from the laser that the light channel structure of device generates.

The above, above example are only to illustrate the technical solution of the utility model, rather than its limitations；Although ginseng The utility model is described in detail according to previous embodiment, it will be understood by those of ordinary skill in the art that：It is still Can be with technical scheme described in the above embodiments is modified, or which part technical characteristic is equally replaced It changes；And these modifications or replacements, various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution Spirit and scope.

Claims

1. a kind of optical device, which is characterized in that including DFB aspheric lasers, glued on the pipe cap inner wall of the DFB aspheric laser Carrier element is posted, the carrier element is equipped with light hole, quarter wave plate, the DFB aspheric laser are posted on the carrier element The light that device is sent out passes sequentially through pipe cap inner wall, light hole and quarter wave plate.

2. optical device according to claim 1, which is characterized in that the wavelength for the light that the DFB aspheric laser is sent out is 1490nm。

3. optical device according to claim 1, which is characterized in that further include the EML lasers set gradually, optically isolated Device, the 2nd WDM optical filters, the first WDM optical filters and single mode optical fiber；

4. optical device according to claim 3, which is characterized in that the wavelength for the light that the EML lasers are sent out is 1577nm。

5. optical device according to claim 3, which is characterized in that further include for receiving the light from the single mode optical fiber The APD detectors of signal.

6. optical device according to claim 5, which is characterized in that the wavelength for the optical signal that the APD detectors receive is 1310nm。