CN210350366U - Wavelength locking device and system thereof - Google Patents
Wavelength locking device and system thereof Download PDFInfo
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- CN210350366U CN210350366U CN201921810634.8U CN201921810634U CN210350366U CN 210350366 U CN210350366 U CN 210350366U CN 201921810634 U CN201921810634 U CN 201921810634U CN 210350366 U CN210350366 U CN 210350366U
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Abstract
The utility model relates to an optical communication field, concretely relates to wavelength locking device and system thereof. The wavelength locking device comprises a first optical splitter, a second optical splitter, a first detector, a second detector and an optical filtering piece, wherein an external light beam enters the first optical splitter to be split, one part of light is output, the other part of light is transmitted to the second optical splitter to be split, one part of light is transmitted to the first detector to be monitored in optical power, the other part of light is transmitted to the second optical splitter to be monitored in optical wavelength, the wavelength locking device further comprises a chip type packaging structure provided with a plurality of pins, the first optical splitter, the second optical splitter, the first detector, the second detector and the optical filtering piece are integrally arranged in the chip type packaging structure, the first optical splitter is arranged in a fit mode with the second optical splitter, and the first detector and the second detector are respectively connected with one pin correspondingly. The utility model discloses a chip formula design, simple structure is compact, occupies smallly, can be applied to in the small transmitter device.
Description
Technical Field
The utility model relates to an optical communication field, concretely relates to wavelength locking device and system thereof.
Background
At present, the optical channel spacing of DWDM systems is advancing from 100GHz to 50GHz and even 25GHz systems, and the systems put more and more strict requirements on the used lasers, and it is necessary to adopt an effective wavelength stabilizing technology to improve the wavelength stability of the lasers. Wavelength locker is meeting this need and is a key component of dense wavelength division multiplexing systems.
With the rapid development of communication, the speed requirement of an optical module is higher and higher, and the requirement on the size of a device is smaller and smaller. Among them, the size requirement of the wavelength locker in the optical module is also getting smaller, especially the wavelength locker applied in the tiny emitter device.
In a commonly used wavelength locking device, signal light emitted by a laser is collimated by an input light collimator and then transmitted to a first beam splitter, the first beam splitter splits the obtained signal light into two beams, wherein one beam is received by a first detector and detects optical power of the signal light, the other beam is filtered by an air gap F-P etalon and then enters a second beam splitter, the second beam splitter splits the received signal light into two beams, one beam is received by a second detector and detects optical power of the beam light, the other beam is collimated by an output light collimator and then is output along an input-output optical path, the first detector and the second detector output detection results to a controller, the controller compares the detection results of the first detector and the second detector to obtain an error signal, and the temperature of the laser is controlled by controlling a thermoelectric cooler TEC according to the error signal, to finally achieve the locking of the laser wavelength.
The existing wavelength locking device is complex in structure, large in occupied size and incapable of being applied to a miniature emitter device.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a wavelength locking device and system thereof, it is complicated to overcome current wavelength locking device structure, occupies volumetrically, can't be applied to the problem in the miniature transmitter device.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a wavelength locking device, includes first optical splitter, second optical splitter, first detector, second detector to and filter, and external beam incides to first optical splitter and splits, and partly light output, another part light transmission carries out the branch light to the second optical splitter, and partly light transmission carries out the optical power control to first detector, and another part light transmission carries out the optical wavelength control to the second optical splitter through filter, wavelength locking device is still including the chip-type packaging structure who is equipped with a plurality of pins, first optical splitter, second optical splitter, first detector, second detector to and filter the integration and set up in chip-type packaging structure, first optical splitter and the laminating of second optical splitter set up, a pin should be connected respectively to first detector and second detector.
The utility model discloses a further preferred scheme is: the chip type packaging structure is further provided with a communication pin, and a part of light output after being split by the first light splitter is transmitted to an external communication end through the communication pin.
The utility model discloses a further preferred scheme is: the filter comprises a linear filter plate which is attached to the second light splitter and used for attenuating the optical power of the light beam.
The utility model discloses a further preferred scheme is: the first light splitter comprises a first light splitting film surface which is plated with a first partial reflection film and splits incident light beams, the second light splitter comprises a second light splitting film surface which is plated with a second partial reflection film and splits the light beams reflected by the first light splitting film surface, and the included angle between the first light splitting film surface and the second light splitting film surface is 45 degrees.
The utility model discloses a further preferred scheme is: the included angle between the incident light beam and the first light splitting film surface is 43-47 degrees.
The utility model discloses a further preferred scheme is: the light incident surface of the first light splitter is plated with a transmission film, and external light beams are incident to the first light splitting film surface through the transmission film to be split.
The utility model discloses a further preferred scheme is: the wavelength locking device further comprises a glass flat sheet, and the glass flat sheet is respectively attached to the light incident surface of the first light splitter and one end surface of the linear filter.
The utility model discloses a further preferred scheme is: the light filtering piece comprises a linear filtering film plated on the light emitting surface of the second light splitter.
The utility model discloses a further preferred scheme is: the wavelength locking device further comprises a laser light source used for emitting laser beams and a collimator, wherein the laser beams emitted by the laser light source are collimated by the collimator to form parallel beams which are transmitted to the first optical splitter for splitting.
The utility model provides a technical scheme that its technical problem adopted is: the control unit controls the first detector to receive the light beam transmitted by the second optical splitter for optical power monitoring, and controls the second detector to receive the light beam output by the optical filter for optical wavelength monitoring.
The beneficial effects of the utility model reside in that, compare with prior art, through adopting the chip-type packaging structure who is equipped with a plurality of pins, will first spectroscope, second spectroscope, first detector, second detector to and the integration of light filtering piece sets up in chip-type packaging structure, and first spectroscope sets up with the laminating of second spectroscope, first detector and second detector correspond respectively and connect a pin, the utility model discloses a wavelength locking device and system adopt the design of chip-type, and overall structure is simple, compact structure, occupy small, can be applied to in small transmitter device, realize the lock ripples function.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic structural diagram of a wavelength locking device according to the present invention;
fig. 2 is a schematic perspective view of a wavelength locker (not including a chip-type package structure) according to the present invention.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the present invention provides a preferred embodiment of a wavelength locker.
A wavelength locking device comprises a first optical splitter 10, a second optical splitter 20, a first detector 30 and a second detector 40, and a filter 50, wherein an external light beam enters the first beam splitter 10 for splitting, a part of the light is output, another part of the light is transmitted to the second beam splitter 20 for splitting, a part of the light is transmitted to the first detector 30 for optical power monitoring, another part of the light is transmitted to the second beam splitter 20 for optical wavelength monitoring through the filter 50, the wavelength locking device further comprises a chip-type package structure 60 provided with a plurality of pins 61, the first optical splitter 10, the second optical splitter 20, the first detector 30, the second detector 40, and the optical filter 50 is integrally arranged in the chip-type package structure 60, the first optical splitter 10 and the second optical splitter 20 are attached, and the first detector 30 and the second detector 40 are respectively and correspondingly connected with a pin 61.
Through adopting chip-type packaging structure 60 that is equipped with a plurality of pins 61, will first optical splitter 10, second optical splitter 20, first detector 30, second detector 40 to and filter 50 integration sets up in chip-type packaging structure 60, and first optical splitter 10 sets up with the laminating of second optical splitter 20, first detector 30 and second detector 40 correspond respectively and connect a pin 61, transmit the luminous power testing result of first detector 30 and the optical wavelength testing result of second detector 40 to external control ware, monitor the luminous power and the optical wavelength of incident beam, realize the locking of wavelength, adopt the design of chip-type, overall structure is simple, compact structure, and it is small to occupy, can be applied to in the small emitter device, realizes the locking function.
Wherein, the external light beam enters the first beam splitter 10, a part of the external light beam is transmitted, a part of the external light beam is reflected to form two parts of light beams, the transmitted part of the light beam is output to the outside, the reflected part of the light beam is transmitted to the second beam splitter 20, the part of the light beam entering the second beam splitter 20 is transmitted, a part of the light beam is reflected, the transmitted part of the light beam is transmitted to the first detector 30, and the reflected part of the light beam is transmitted to the second detector 40. Wherein, the reflection and transmission ratio of the first beam splitter 10 and the second beam splitter 20 to the light beam can be set according to the requirement.
And the first detector 30 and the second detector 40 both use photodetectors.
Further, the chip-type package structure 60 is further provided with a communication port 62, and a part of light split by the first optical splitter 10 is output and transmitted to an external communication terminal through the communication port 62. That is, the incident light beam is split by the first beam splitter 10, and the light beam of the transmitted portion is transmitted to the external communication terminal through the communication port 62 of the chip-type package structure 60.
In this embodiment, the optical filter 50 includes a linear filter attached to the second beam splitter 20 for attenuating the optical power of the light beam. The light beam reflected by the second beam splitter 20 enters a linear filter, the linear filter attenuates the light power of the light beam according to the wavelength, the light beam attenuated by the light power is transmitted to the second detector 40, and the light wavelength monitoring is realized through the change of the light power.
Of course, in other embodiments, the optical filter 50 may also be a linear filter film plated on the light-emitting surface of the second beam splitter 20. The linear filter film can also perform optical power attenuation on the light beam reflected by the second beam splitter 20, and the light beam with the optical power attenuated is transmitted to the second detector 40, so that the optical wavelength monitoring is realized through the change of the optical power.
In this embodiment, the first beam splitter 10 includes a first dichroic film surface 11 that is plated with a first partial reflection film and splits an incident light beam, the second beam splitter 20 includes a second dichroic film surface 21 that is plated with a second partial reflection film and splits a light beam reflected by the first dichroic film surface 11, and an included angle between the first dichroic film surface 11 and the second dichroic film surface 21 is 45 °. The incident light beam is partially transmitted and partially reflected by the first partially reflective film, and the incident light beam is partially transmitted and partially reflected by the second partially reflective film. The first light splitter 10 and the second light splitter 20 are attached to each other, and an included angle between the first light splitting film surface 11 and the second light splitting film surface 21 is 45 degrees, so that the incident light beam is split twice, and the structure of the wavelength locking device is more compact.
Further, the incident beam and the first light splitting film surface 11 form an included angle of 43 ° to 47 °. The included angle setting of incident beam and first beam splitting facet 11 is 43 ~ 47, realizes the total reflection of the light beam of reflection part, prevents the light leak, improves the performance of product. In this embodiment, the incident light beam preferably forms an angle of 45 ° with respect to the first light splitting surface 11.
Further, a transmission film is plated on the light incident surface of the first light splitter 10, and external light beams enter the first light splitting film surface 11 through the transmission film for splitting light.
In this embodiment, the wavelength locking device further includes a glass flat sheet 70, and the glass flat sheet 70 is respectively attached to the light incident surface and the linear filter of the first optical splitter 10. The flat glass sheet 70 facilitates the auxiliary processing and makes the overall structure of the wavelength locker more stable. The transmissive film may also be disposed on the end surface of the flat glass sheet 70 on which the incident light beam is incident.
Further, the wavelength locking device further includes a laser light source 80 for emitting a laser beam, and a collimator 90, wherein the laser beam emitted by the laser light source 80 is collimated by the collimator 90 to form a parallel beam, and the parallel beam is transmitted to the first optical splitter 10 for splitting. The light beam emitted by the laser source 80 is divergent light, and is collimated by the collimator 90 to form a parallel light beam, which is incident to the first beam splitter 10.
Wherein the laser light source 80 may be a photodiode. The collimator 90 may employ a collimating lens.
In this embodiment, the first optical splitter 10 and the second optical splitter 20 may be adhered and attached by glue. The linear filter and the second beam splitter 20, and the linear filter and the glass flat sheet 70 can be bonded together by glue.
The present invention also provides a preferred embodiment of a wavelength locking system.
A wavelength locking system comprises the wavelength locking device and a control unit connected with a first detector 30 and a second detector 40 of the wavelength locking device, wherein the control unit controls the first detector 30 to receive a light beam transmitted by a second optical splitter 20 for optical power monitoring, and controls the second detector 40 to receive a light beam output by an optical filter 50 for optical wavelength monitoring.
The wavelength locking device in the wavelength locking system is characterized in that the first optical splitter 10, the second optical splitter 20, the first detector 30, the second detector 40 and the optical filter 50 are integrally arranged in the chip type packaging structure 60 by adopting the chip type packaging structure 60 provided with a plurality of pins 61, the first optical splitter 10 and the second optical splitter 20 are arranged in a laminating way, the first detector 30 and the second detector 40 are respectively and correspondingly connected with one pin 61, the controller controls the first detector 30 to detect the light power and controls the second detector 40 to detect the light wavelength, monitors the light power and the light wavelength and can feed back and send detection signals to the laser light source 80, adjust the laser light source 80 to emit laser beams with stable wavelength, realize the locking of the wavelength, the chip type design is adopted, the whole structure is simple, the structure is compact, the occupied volume is small, and the wavelength locking device can be applied to a tiny transmitter device, the wave locking function is realized.
It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and all such modifications and alterations should fall within the scope of the appended claims.
Claims (10)
1. The utility model provides a wavelength locking device, includes first optical splitter, second optical splitter, first detector, second detector to and filter, and external beam incides to first optical splitter and carries out the beam split, partly light output, and another part light transmission carries out the beam split to the second optical splitter, and partly light transmission carries out the optical power control to first detector, and another part light transmission carries out the optical wavelength control to the second optical splitter through filter, its characterized in that: the wavelength locking device further comprises a chip type packaging structure provided with a plurality of pins, the first optical splitter, the second optical splitter, the first detector, the second detector and the optical filter are integrally arranged in the chip type packaging structure, the first optical splitter and the second optical splitter are arranged in a laminating mode, and the first detector and the second detector are respectively connected with one pin correspondingly.
2. The wavelength locker of claim 1, wherein the chip-type package structure further comprises a communication pin, and a part of the light split by the first splitter is transmitted to an external communication terminal through the communication pin.
3. The wavelength locker of claim 1, wherein the filter comprises a linear filter disposed adjacent to the second beam splitter for attenuating the optical power of the light beam.
4. The wavelength locker of claim 1, wherein the first beam splitter comprises a first beam splitting surface coated with a first partially reflective film for splitting an incident light beam, and the second beam splitter comprises a second beam splitting surface coated with a second partially reflective film for splitting a light beam reflected by the first beam splitting surface, and an angle between the first beam splitting surface and the second beam splitting surface is 45 °.
5. The wavelength locker of claim 4 wherein the incident beam forms an angle of 43 ° to 47 ° with respect to the plane of the first dichroic film.
6. The wavelength locker of claim 5, wherein the light incident surface of the first beam splitter is coated with a transmission film, and an external light beam is incident on the first light splitting surface through the transmission film for splitting.
7. The wavelength locker of claim 3, further comprising a flat glass sheet disposed in close contact with the light incident surface of the first beam splitter and an end surface of the linear filter, respectively.
8. The wavelength locker of claim 1, wherein the filter comprises a linear filter film coated on the light emitting surface of the second beam splitter.
9. The wavelength locking device according to any one of claims 1 to 8, further comprising a laser light source for emitting a laser beam, and a collimator, wherein the laser beam emitted by the laser light source is collimated by the collimator to form a parallel beam, and the parallel beam is transmitted to the first beam splitter for splitting.
10. A wavelength locking system, comprising the wavelength locking device of any one of claims 1 to 9, and a control unit connected to the first detector and the second detector of the wavelength locking device, wherein the control unit controls the first detector to receive the light beam transmitted by the second beam splitter for optical power monitoring, and controls the second detector to receive the light beam output by the optical filter for optical wavelength monitoring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921810634.8U CN210350366U (en) | 2019-10-25 | 2019-10-25 | Wavelength locking device and system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921810634.8U CN210350366U (en) | 2019-10-25 | 2019-10-25 | Wavelength locking device and system thereof |
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| CN210350366U true CN210350366U (en) | 2020-04-17 |
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| CN201921810634.8U Active CN210350366U (en) | 2019-10-25 | 2019-10-25 | Wavelength locking device and system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466979A (en) * | 2021-07-01 | 2021-10-01 | 希烽光电科技(南京)有限公司 | Double-reflection prism for photoelectric monitoring and photoelectric monitoring assembly thereof |
-
2019
- 2019-10-25 CN CN201921810634.8U patent/CN210350366U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466979A (en) * | 2021-07-01 | 2021-10-01 | 希烽光电科技(南京)有限公司 | Double-reflection prism for photoelectric monitoring and photoelectric monitoring assembly thereof |
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Address after: 518000 No. 35, Cuijing Road, Pingshan New District, Shenzhen, Guangdong Patentee after: Ona Technology (Shenzhen) Group Co.,Ltd. Address before: No.35 Cuijing Road, Pingshan District, Shenzhen City, Guangdong Province Patentee before: O-NET COMMUNICATIONS (SHENZHEN) Ltd. |
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