WO2017140164A1

WO2017140164A1 - Light emitting component having beam regulator, light receiving component having beam regulator, and optical module

Info

Publication number: WO2017140164A1
Application number: PCT/CN2016/109569
Authority: WO
Inventors: 高国祥
Original assignee: 深圳新飞通光电子技术有限公司
Priority date: 2016-02-19
Filing date: 2016-12-13
Publication date: 2017-08-24
Also published as: CN107102405A

Abstract

A light emitting component having a beam regulator, a light receiving component having a beam regulator, and an optical module. In addition to a laser component (110)/photoelectric detector (260), a laser alignment lens component (120)/fiber alignment lens (220), wavelength division multiplexing combiner/separator modules (140, 230), a focusing coupling lens (150)/focusing coupling leans component (250) and fibers (160, 210), beam regulator components (130, 240) are arranged between the laser alignment lens component (120) and the wavelength division multiplexing combiner/separator module (140) of the light emitting component and between the wavelength division multiplexing combiner/separator module (230) and the focusing coupling lens component (250) of the light emitting component; bean regulators of different shapes, sizes and refractive index parameters are added to separated channel light paths so that the channel light paths can be regulated separately, thus maximizing the light path coupling efficiency and providing a new concept of structure process design for more and more communication channels and more and more compact light path integration in optical fiber communications. The characteristics of simple structure, easy implementation and the like are achieved, hence make it possible to achieve early commercial use of a high-speed communication module.

Description

Description: A light emitting component, a light receiving component and an optical module with a beam adjuster

[0001] The present invention relates to the field of optical communication technologies, and in particular, to a light emitting component with a beam adjuster, a light receiving component with a beam adjuster, and an optical module.

Background technique

[0002] At present, high-speed optical communication modules exhibit features such as miniaturization, low power consumption, hot swap, and multi-channel wavelength parallel operation. As the content of optical communication continues to expand, the transmission rate and the occupied channel continue to increase. In order to solve the problems that arise, the more popular method is to use the principle of optical waveguide or thin film filter to make multi-channel optical communication. The wavelength division multiplexing combined wave division module (hereinafter referred to as the combined wave division module). When the number of signal channels exceeds 4 channels and the wavelength interval is very narrow, such as the newly proposed LAN-WD M 400G 8 channel standard, the use of the waveguide principle to fabricate the combined wave demultiplexing module will greatly increase the device size, and the same channel. The insertion loss will become larger and the power consumption of the device and the optical module will be difficult to meet the application requirements. Another type of multiplexed wave splitting module based on the principle of thin film filter can be easily assembled and assembled in the design channel number of 4, but once it is extended to 8 channels, it will make the angular deviation and the cumulative position deviation of the exit point. Larger appearance, and the deviation of the exit angle between the different channels and the positional deviation of the exit point will result in insufficient channel coupling efficiency for some channels, which will seriously affect the production yield of the final high-speed multi-channel transmit or receive components. At present, the more common solution is to use a 4-channel split-wavelength splitting module with two different bands to make a 4-channel transmit or receive component, and then connect them to a total of 8 channels using a 2x1 online WDM multiplexer. Device. However, the problem of fiber winding can be another problem, and the space size will become very large.

technical problem

[0003] In order to overcome the above disadvantages, the present invention proposes a beam adjuster that adds different shape sizes and refractive index parameters in each discrete channel optical path, such that the beam of each channel enters or exits the multiplexed wave splitting module. The 吋 beam has reached the best fit with the internal optical path of the multiplexed wave splitting module, thereby minimizing the difference in the parallelism of the incident incident beam and the individualized deviation of the exiting incident point difference between different channels of each multiplexed wave splitting module. The single-channel optical coupling efficiency decreases. Make the finished product yield and optical performance of the component The increase is increased.

Problem solution

Technical solution

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A light emitting component with a beam adjuster, comprising a laser array, a laser collimating lens assembly, a multiplexer demultiplexing module, a focus coupling lens, and an optical fiber, wherein: the laser collimating lens assembly and the combined wave division A beam adjuster assembly is also disposed between the wave modules. N lasers are disposed in the laser array, N laser collimating lenses are disposed in the laser collimating lens assembly, and at least one up to N beam adjusters are disposed in the beam adjuster assembly. N laser beams of different wavelengths emitted by the N lasers are respectively collimated by N laser collimating lenses, directly injected into or through the beam adjuster and injected into the N sub-wavelength channels of the multiplexer module. The multiplexed waves converge into a beam that is focused by a focus coupling lens and coupled into the fiber.

[0006] When the energy of a channel's optical coupling into a common fiber does not meet the performance requirements of the transmitting component, the beam adjuster will be placed between the laser collimating lens of the channel and the bandpass film filter, Select different shape and refractive index parameters of the beam adjuster, adjust the tilt direction and tilt angle of the beam adjuster, change the beam position and incident angle of the beam into the multiplexed wave splitting module, thereby improving the mode field matching quality at the receiving end of the fiber. That is, coupling efficiency.

[0007] A light receiving component with a beam adjuster, comprising an optical fiber, a fiber collimating lens, a wavelength division multiplexing combining wave splitting module, a focus coupling lens component, and a photodetector array, wherein: A beam adjuster assembly is also disposed between the combined wave splitting module and the focus coupling lens assembly. N photodetectors are disposed in the photodetector array, N focus coupling lenses are disposed in the focus coupling lens assembly, and at least one up to N beam adjusters are disposed in the beam adjuster assembly . The optical signal input by the optical fiber is incident into the multiplexed channel of the wavelength division multiplexed multiplexed wave splitting module via the collimating lens, and is emitted in the N partial wave channels, directly injected in one-to-one or injected into the N through the beam adjuster. In the focus coupling lens, respectively, N focus detectors are coupled into the N photodetectors, and converted to generate electrical signals.

[0008] When the energy of a channel of light coupling into the photodetector does not meet the performance requirements of the receiving component, the beam adjuster will be placed between the multiplexer and the focus coupling lens of the channel, through Select different shape and refractive index parameters of the beam adjuster, and adjust the tilt direction and tilt of the placement The oblique angle changes the beam position and the exit angle of the beam emitted from the multiplexer module, thereby functioning together with the position adjustment of the focus coupling lens to improve the light energy receiving efficiency on the photodetector.

[0009] Based on the above-described light emitting component and light receiving component, the present invention also provides an optical module including a light emitting component and/or a light receiving component; wherein, in the light emitting component and/or the light receiving component Both are provided with the beam adjuster described above.

[0010] Further, the beam adjuster performs a translation adjustment on the source beam, and the adjusted offset thereof

Country

Hidden

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Where n is the refractive index of the selected optical sheet of the beam adjuster, T is the thickness of the optical sheet selected by the beam adjuster, and α is the deflection angle of the selected optical sheet of the beam adjuster.

[0011] Further, the beam adjuster makes an angle adjustment to the forward direction of the source beam, and adjusts the angle to scare;

Leak

Where n is the refractive index of the selected optical sheet of the beam adjuster, Θ is the wedge angle of the optical sheet selected by the beam adjuster, and α is the deflection angle of the selected optical sheet of the beam adjuster.

[0012] Further, the N is greater than or equal to 2.

Advantageous effects of the invention

Beneficial effect

[0013] The present invention provides a method for independently adjusting the optical paths of each channel by using a beam adjuster in an optical path to integrate more and more communication channels in an optical fiber communication with an increasingly compact optical path, thereby improving the coupling efficiency of the optical paths of the respective channels. New ideas. It has the characteristics of simple structure and easy implementation, which makes it possible to commercialize high-speed communication modules as early as possible.

Brief description of the drawing

DRAWINGS

1 is a schematic view of a light emitting component with a beam adjuster of the present invention;

2 is a schematic view of a light receiving assembly with a beam adjuster of the present invention;

3 is a schematic diagram of a principle of a beam adjuster;

4 is a schematic diagram of another principle of a beam adjuster. BEST MODE FOR CARRYING OUT THE INVENTION

BEST MODE FOR CARRYING OUT THE INVENTION

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is apparent that the described embodiments are only a few embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

[0019] First, a light emitting component with a beam adjuster according to the present invention is introduced. As shown in FIG. 1 , the light emitting component includes a laser array 110 (in this embodiment, N=4 is taken as an example), and laser collimation is performed. The lens assembly 120, the beam adjuster assembly 130, the multiplexer demultiplexing module 140, the focus coupling lens 150, and the optical fiber 160; the four laser chips 111-114 in the laser array 110 emit four different wavelengths of light through the laser collimating lens After the four laser collimating lenses 121-124 included in the component 120 are collimated, they are respectively injected into the multiplexer/demultiplexer module 140 via the beam adjusters 131-134 in the respective channels (some channels can be used without the beam adjuster). The divided channels 141 to 144 are combined and output from the combined channel of 140, coupled to the shared optical fiber 160 via a common focus coupling lens 150 for signal transmission.

[0020] The principle of the beam adjusters 131-134 is shown in FIG. 3. If the optimal collimated beam matching needs to be adjusted for translation of the source beam, the required offset offset can be calculated by the following formula:

[0021] Different offsets can be obtained by selecting optical sheets of different refractive indices _n and different thicknesses T and adjusting their deflection angles a.

[0022] The principle of the beam adjusters 131-134 can also be as shown in FIG. 4. If the optimal collimated beam matching needs to further adjust the direction of the source beam to be slightly adjusted, the required angle β can be calculated by the following formula:

[0023] Different optical angles of different refractive indices _η and different wedge angles _θ are selected, and the deflection angle α is adjusted to obtain different fine adjustment angles.

[0024] Therefore, a beam adjuster is disposed between the laser collimating lens of the light emitting component channel and the band pass film filter, and the tilting of the beam is adjusted by selecting different shape sizes and refractive index parameters of the beam adjuster. The direction and the tilt angle can change the position and incident angle of the beam entering the multiplexed wave splitting module, thereby improving the mode field matching quality at the fiber receiving surface, that is, the coupling efficiency.

[0025] Next, a light receiving component with a beam adjuster according to the present invention is introduced. As shown in FIG. 2, the light receiving component includes an optical fiber 210, a collimating lens 220, and a 合 channel multiplexing/demultiplexing module (this embodiment). For example, N=4 is taken as an example.) 230 includes four demultiplexing channels 231-234, a beam adjuster assembly 240, a focus coupling lens assembly 250, and a photodetector array 260. The optical signal input by the optical fiber 210 (the optical signal containing 4 wavelengths) is collimated by the collimating lens 220 and then injected into the multiplexed channel of the multiplexed wave splitting module, and first reaches the first splitting channel 231 for the optical signal. The light beam having the same wavelength as the transmission wavelength of 231 is transmitted through 231, and is directed to the focus coupling lens 251 via the beam adjuster 241, and the beams of the remaining wavelengths are reflected again into the multiplexed wave splitting module and reflected by the reflective area on the left side of 230. Arrived on the second split channel 232. A light beam having a wavelength corresponding to a transmission wavelength of 232 is transmitted through the beam adjuster 242 to the second focus coupling lens 252, and the light beams of the remaining wavelengths are again reflected to the reflection area on the left side of the multiplexer/demultiplexer module 230. Furthermore, it reaches the third branching channel by another reflection. By analogy, an optical signal containing four wavelengths is split into four different wavelengths of light in four divided channels, each incident through a beam adjuster (some channels can be used without a beam adjuster) to four focus coupling lenses 251 ~254, and then through the four focus coupling lenses focus coupling into the four photodetectors 261 ~ 264, converted into four electrical signals, transmitted to the circuit board of the latter stage, thus completing the reception of four optical signals.

[0026] As described above, a beam adjuster is disposed between the combined wave splitting module and the focus coupling lens of the light receiving component channel, and the different shape and refractive index parameters of the beam adjuster are selected, and the tilt direction of the beam adjuster is adjusted. And the tilt angle, the position and the exit angle of the beam after being emitted from the multiplexer module can be changed, thereby functioning together with the position adjustment of the focus coupling lens to improve the light energy receiving efficiency on the photodetector.

[0027] The light-emitting component or the light-receiving component of the present embodiment is configured as an optical module, or the light-emitting component and the light-receiving component proposed in the embodiment are integrated and designed to form an integrated light. The module can provide 4 channels (or more) of wavelength channels for optical signal transmission, and meets the requirements of access network design for high-speed data communication of 100 Gbps and above.

[0028] Applying the embodiment of the present invention to a module with a current wavelength channel of 4 channels can improve the optical path coupling efficiency of the core optical component, thereby improving the component yield yield and reducing the module cost; In the module with 8 channels, the 2x1 online WDM multiplexer can continue to use the two optical modules of the 4 wavelength channels working in different bands to be connected, and the invention can be directly implemented. The technology of the example is extended to a single optical component of 8 channels, which eliminates the trouble of using an additional 2x1 online WDM multiplexer and optical fiber winding, which greatly reduces the difficulty of designing the structure of the 8-way optical module, and is advantageous for accelerating the commercial use of the module. process.

Claims

Claim

A light emitting component with a beam adjuster, comprising a laser array, a laser collimating lens assembly, a wavelength division multiplexing combining wave demultiplexing module, a focusing coupling lens and an optical fiber, wherein: the laser collimating lens assembly and the wavelength division A beam adjuster assembly is further disposed between the multiplexed multiplexed wave splitting modules; N lasers are disposed in the laser array, and N laser collimating lenses are disposed in the laser collimating lens assembly, At least one up to N beam adjusters are disposed in the beam adjuster assembly; N different wavelengths of laser beams emitted by the N lasers are respectively collimated by N laser collimating lenses, directly injected or passed through the beam adjuster The N wavelength division channels of the wavelength division multiplexing combining/demultiplexing module are merged into a single beam by a combining wave, and are focused by a focus coupling lens and coupled into the optical fiber.

The light emitting device according to claim 1, wherein: said beam adjuster performs translation adjustment on the source beam, and the adjusted offset thereof

Where n is the refractive index of the selected optical sheet of the beam adjuster, T is the thickness of the selected optical sheet of the beam adjuster, and α is the deflection angle of the selected optical sheet of the beam adjuster. The light emitting device according to claim 1, wherein: said beam adjuster adjusts an angle of a direction in which the source beam is advanced, and adjusts an angle thereof.

Where n is the refractive index of the selected optical sheet of the beam adjuster, Θ is the wedge angle of the selected optical sheet of the beam adjuster, and α is the deflection angle of the selected optical sheet of the beam adjuster. A light receiving component with a beam adjuster, comprising an optical fiber, a fiber collimating lens, a wavelength division multiplexing combining wave splitting module, a focus coupling lens component and a photodetector array, characterized by: Wavelength division multiplexing multiplexing A beam adjuster assembly is further disposed between the beam splitting module and the focus coupling lens assembly; N photodetectors are disposed in the photodetector array, and N focus coupling lenses are disposed in the focus coupling lens assembly, At least one up to N beam adjusters are disposed in the beam adjuster assembly; the optical signal input by the optical fiber is passed through The straight lens is incident on the multiplexed channel of the wavelength division multiplexed multiplexed wave splitting module, and is emitted in the N partial wave channels, which are directly incident in one-to-one or injected into the N focus-coupled lenses through the beam adjuster, through focusing The coupling lenses are respectively coupled into the N photodetectors and converted to generate electrical signals.

[Claim 5] The light receiving assembly according to claim 4, wherein: the beam adjuster performs a translation adjustment on the source beam, and the adjusted offset thereof

Wai

Discussion

[Claim 6] The light receiving component according to claim 4, wherein: the beam adjuster makes an angle adjustment to a direction in which the source beam is advanced, and the angle of adjustment is adjusted.

Where η is the refractive index of the selected optical sheet of the beam adjuster, Θ is the wedge angle of the optical sheet selected by the beam adjuster, and α is the deflection angle of the selected optical sheet of the beam adjuster.

[Claim 7] An optical module, characterized in that: the optical module is provided with the light-emitting component with a beam adjuster according to claim 1 and/or the light-receiving with a beam adjuster according to claim 4. Component.

[Claim 8] The optical module according to claim 7, wherein: the beam adjuster performs a translation adjustment on the source beam, and the adjusted offset thereof

Where η is the refractive index of the optical sheet selected by the beam adjuster, Τ is the thickness of the optical sheet selected by the beam adjuster, and α is the deflection angle of the selected optical sheet of the beam adjuster.

[Claim 9] The optical module according to claim 7, wherein: the beam adjuster adjusts an angle of a direction of the source beam, and adjusts the angle

Where n is the refractive index of the selected optical sheet of the beam adjuster, Θ is the wedge angle of the selected optical sheet of the beam adjuster, and α is the deflection angle of the selected optical sheet of the beam adjuster.

[Claim 10] The optical module according to claim 7, wherein: the N is greater than or equal to 2.