TWM241891U - Fixing structure for bi-directional optical transceiving module - Google Patents

Description

M241891 V. Creation Instructions (1) [Technical Field to which the New Type belongs] This case is a fixed structure of a bi-directional optical transceiver module (Bi-Di TRx), especially with openings on the outer walls of both sides of the module case, and The openings are penetrated between them to put and fix the multiplexer (WDM,

Wavelength Division Multiplexer and Filter (Fixed) Optical module fixed structure. [Previous technology] Bi-Di TRx (Bi-Di TRx, Bi-Didirectional WDM Transceiver Module) refers to a single-mode fiber (SMF,

Single Mode Fiber), which can send and receive two light sources with different wavelengths (1 550/13 1 0 n m) at the same time, to achieve a bidirectional module design. This kind of bidirectional transmission design can increase the use of optical fiber bandwidth. Compared with the design of the traditional dual-fiber transmission module, it not only saves the use of one optical fiber, but also reduces the module volume and increases the bandwidth of the computer room for high bandwidth. use. The first picture shows a conventional Bi-Di TRx schematic diagram, which is mainly composed of a laser diode 11 (LD, Laser Diode), a PIN photodiode 12 (PD, PIN Photo Diode), and a demultiplexer 13 ( WDM, Wavelength Division Multiplexer) and filter 14 (Filter) are assembled together in the module housing 17, and can be passed through the optical fiber connector 15 (such as Receptacle,

Pigtail) is connected to a single-mode fiber 16 (SMF, Single Mode Fiber) for two-way signal transmission.

The working principle of Bi-Di TRx is to use LD1 1 as the light source, receive the electrical signal output by the driving circuit (Dr i ver), and convert it into a wavelength λ i (such as

Page 5 M241891 V. Creative Instructions (2) 1550 nm) light signal is sent; and pD1 2 is used as a photosensitive device to receive the wavelength; I (such as 131 Onm) light signal and converted into a signal Then, the signal is amplified and output through a transimpedance amplifier (TIA, Transimpedance Amplifier). The WDM13 in the first figure is used to separate; I and λ are two light sources with different wavelengths, so that LD1 1 sends them; I light signals can pass through WDM1 3 and reach SMF16 to send out; and SMF16 comes; l2 light The signal is reflected by WDM13, and then transmitted through F i 11 er 1 4 and received by PD 1 2 to achieve the dual-wavelength bidirectional transmission purpose. Placing F i 1 ter 1 4 can make PD1 2 only receive the λ 2 optical signal and exclude the λ optical signal, so as to achieve the purpose of reducing 〇ptica 1 C r 〇ss-T a 1 k, as shown in the second figure. One of Bi-Di TR x assembly's conventional technologies, in which WDM 13 and LD11 (TO-CAN package) are first placed in the module housing 17 and aligned with the SMF 16 in the fiber optic connector 15 Fix and finally assemble PD12 and adjust it. The currently known Bi-Di TRx assembly technology is as shown in the second figure when assembling WDM. It must be installed before assembly of other components and adjustment work, so that the entire B i-D i TRx assembly process It seems complicated; while WDM is directly fixed in the module housing of Bi-Di TRx, the fixing and alignment of WDM is more difficult. Therefore, it is necessary to improve the conventional technology. [Purpose of this case] In order to meet the above requirements, this case is to conceive a fixing structure of a bidirectional optical transceiver module by digging an opening on each of the two outer walls of the opposite side of the module case, and

Page 6 M241891 V. Creation instructions (3) The two openings are connected between them to put and fix the optical module including a wavelength division multiplexer (WDM, Wavelength Division Multiplexer) and a wavelet (F i 1 ter). group. In this case, a through structure is used to insert and fix the fixing structure of the optical module that integrates WDM and Fi Iter, not only can easily and accurately align the positioning between WDM, Filter r and LD, PD, SMF In addition, the two ends of the optical module are fixed to the openings on the two sides of the module case by means of adhesion, etc., which will be stronger than the conventional method of fixing the WDM carrier with only one end, thereby achieving the purpose of improving the conventional technology.

[Creation content] In order to achieve the above purpose, this case proposes a fixed structure of a bi-directional optical transceiver module (Bi-Di TRx), which is characterized in that each of the two outer walls of the module housing of the bi-directional optical transceiver module is provided with an opening, It is used to put an optical module including a wavelength division multiplexer (WDM, Wavelength Division Multiplexer) and a filter (Fi 11 er), and fix it. The fixed structure of the two-way optical transceiver module as described above, wherein the two outer walls of the module case are the two outer walls of the opposite side.

The fixed structure of the two-way optical transceiver module as described above, wherein the openings are penetrated between to accommodate the optical module. As described in the fixed structure of the bidirectional optical transceiver module, the angle between the demultiplexer and the filter is 45 degrees. As described in the fixed structure of the bidirectional optical transceiver module, the optical module must allow a first optical signal to be accessed from the outside in terms of mechanism design.

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After entering through and passing through the demultiplexer, leave the optical module. As described in the fixed structure of the two-way optical transceiver module, in terms of the mechanical design of the optical module, a second optical signal must be allowed to enter and enter from the outside, and be reflected by the demultiplexer, and then pass through the filter. After the sensor, turn on the optical module. As described in the fixing structure of the two-way optical transceiver module, the two ends of the optical module can be respectively fixed on two openings of the module case. [Embodiment]

Please refer to the third figure, which is a schematic diagram of a fixed structure of a bidirectional optical transceiver module according to a preferred embodiment of the present invention. As shown in the figure, the Bi-di TRx (Bi-directional WDM Transceiver Module) consists of a laser diode 11 (LD, Laser Diode) and a PIN photodiode 12 (PD, Pr Photo Diode). ) Are assembled together in the module housing 32; and a wavelength division multiplexer 311 (WDM, Wavelength Division Multiplexer) and a filter 312 (Fi Iter) are arranged in the optical module 31. An opening 3 2 1 is left on each of the two outer walls of the module housing 32. The two openings 3 2 1 are connected through each other. The function is to put the optical module 31 and fix it to the mold. Inside the set of shells 3 2. The fourth figure shows that the optical module 3 1 has been fixed in the module housing 3 2

Intention ^ Please refer to the fifth figure, which is a schematic diagram of the Bi-Di TRx operation of the preferred embodiment of the present application. As shown in the figure, the optical module 31 is properly adjusted (eight 11211111611〇, so that% 0 ^ 1311 and? 11 Seven 61'312 are correctly positioned 'and fixed in the module housing 32. WDM31 1 is inclined at 45 degrees The angle is set in the optical module 31 '

Page 8 M241891 V. Creative Instructions (5) Allow the λ optical signal (first optical signal) sent by LD1 1 to penetrate WDM31 1 and reach SMF 1 6 for transmission; and the λ 2 optical signal transmitted by SMF 16 ( The second optical signal) is reflected by WDM31 1 and filtered by Fi Iter3 12 to receive noise by PD 1 2. In addition, 'in order to let you and 2 optical signals pass through WDM311 and Filter312 in the optical module 31 as shown in the figure, the optical module 31 should have openings in the outer wall and a channel in the mechanism design, The λ Αλ 2 optical signal can be transmitted between LD1, PD12 and SMF16 through WDM311 and Filter312. The sixth figure shows the appearance of the Bi-Di TRx fixing structure of the preferred embodiment of the present invention. The optical module 31 can be fixed to the two openings on the outer wall of the module case 3 2 by means of adhesion or the like. On 3 2 1 (the opening on the other side is 3 2 1), compared with the conventional technology in the second figure, the load of WDM 1 2 is fixed only at one end. The fixing structure in this case is obviously relatively strong. A cross-sectional view of the B i -D i TRx fixing structure of the preferred embodiment of the present case shown in the seventh figure, from which the WDM31 1 and Fi Iter312 in the optical module 32, the LD1, the PD 12 and the fiber connector 15 Relationship between institutions. In summary, this case is an improvement on conventional technology. By digging one opening on each of the two outer walls of the opposite sides of the module housing of Bi-Di TRx, and the two openings are continuous, An optical module including a wavelength division multiplexer (WDM, Wavelength Division Multiplexer) and a filter (F i 11 er) is put in and fixed. The progress of this case is that assembling WDM and Filter in a modular manner not only has a simple shape and is easy to process, which is helpful for manufacturing; and it is adopted on the two outer walls of the B i-D i T R X module housing.

Page 9 M241891 V. Creation instructions (6) The fixed structure of the intersecting openings for placing and fixing the optical module integrating WDM and F i 1 ter, not only can simply and accurately adjust (A 1 ignment) WD The positioning between Μ, F i 11 er and LD, PD, SMF, and the two ends of the optical module are fixed to the openings on the two sides of the module case by means of adhesion, etc. The fixed structure of the case is much stronger. Therefore, the progress of this case is obvious.

The technology disclosed in this case may be implemented by those skilled in the art, and its unprecedented approach is also patentable, and it is necessary to file a patent application in accordance with the law. However, the above embodiments are not enough to cover the scope of patents to be protected in this case. Therefore, the scope of application for patents is attached as follows.

Page 10 M241891 Schematic description of the diagram [Simple description of the diagram] In this case, you can get a deeper understanding through the following diagrams and detailed descriptions: The first diagram: the conventional Bi-Di TRx schematic diagram. The second picture is the conventional technology of Bi-Di TRx assembly. Third figure: The schematic diagram of the fixed structure of the bidirectional optical transceiver module in the preferred embodiment of the present case. Fig. 4: Schematic diagram of the optical module 31 already fixed in the module case 32. Fifth figure: Bi-Di TRx working schematic diagram of the preferred embodiment of this case. Figure 6: A schematic diagram of the external appearance of the Bi-Di TRx fixing structure in the preferred embodiment of the present case. Figure 7: A cross-sectional view of the B i -D i TRx fixed structure of the preferred embodiment of the case ◦ The figure numbers of the main components are shown below: 11: Laser diode (LD) 12: PIN photodiode PIN (PD, PIN Photo Diode) 13: Wavelength Division Multiplexer (WDM) 1 4: Filter (F i 11 er) 1 5: Fiber Connector 16: Single Mode Fiber (SMF, Single Mode Fiber) 1 7: Module housing 31: Optical module 31 1: Demultiplexer (WDM) 3 1 2: Filter (F i 11 er ·)

M241891

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Claims (1)

M241891 VI. Application for patent scope 1. A fixed structure of a bi-directional optical transceiver module (Bi-Di TRx), which is characterized in that each of the two outer walls of the module housing of the bi-directional optical transceiver module is provided with an opening for receiving An optical module including a wavelength division multiplexer (WDM, Wavelength Division Multiplexer) and a filter (Filter) is inserted and fixed. 2. The fixed structure of the bi-directional optical transceiver module as described in item 1 of the scope of the patent application, wherein the two outer walls of the module housing are the two outer walls of the opposite side. 3. The fixed structure of the bi-directional optical transceiver module as described in item 1 of the scope of the patent application, wherein the openings are continuous to accommodate the optical module. 4. The fixed structure of the bidirectional optical transceiver module as described in item 1 of the scope of patent application, wherein the angle between the demultiplexer and the filter is 45 degrees. 5. The fixed structure of the bi-directional optical transceiver module as described in item 1 of the scope of the patent application, in which the optical module must allow a first optical signal to enter from the outside and pass through the demultiplexer. Then, leave the optical module. 6. The fixed structure of the bidirectional optical transceiver module described in item 1 of the scope of the patent application, in which the optical module must be designed to allow a second optical signal to enter from the outside and pass through the demultiplexer After reflection, it passes through the filter and leaves the optical module. 7. The fixed structure of the bi-directional optical transceiver module as described in item 1 of the scope of patent application, wherein both ends of the optical module can be fixed on the two openings of the module case.