CN2689260Y

CN2689260Y - Fixer of two-dimensional optical transmit-receive modular set

Info

Publication number: CN2689260Y
Application number: CNU032798768U
Authority: CN
Inventors: 关耀宇
Original assignee: Radiantech Inc
Current assignee: Radiantech Inc
Priority date: 2003-09-22
Filing date: 2003-09-22
Publication date: 2005-03-30
Anticipated expiration: 2013-09-22

Abstract

The utility model relates to a fixing structure of a bidirectional optical transmiting and receiving modular set (Bi-DiTRx). The utility model is characterized in that outer walls of both surfaces of an outer casing of the bidirectional optical transmiting and receiving modular set are respectively provided with an open hole, wherein the two open holes interpenetrate and are used for placing and fixing an optical modular set which comprises a wavelength division multiplexer (WDM, Wavelength Division Multiplexer) and a filter (Filter).

Description

The fixed sturcture of bidirectional light receiving and transmitting module

Technical field

The utility model is the fixed sturcture of a kind of bidirectional light receiving and transmitting module (Bi-Di TRx), especially refer on the outer wall of the two sides of module shell, respectively be provided with perforate, and connect between the perforate, to put into and fixedly to comprise the fixed sturcture of the optics module of partial wave multiplexer (WDM, Wavelength Division Multiplexer) and wave filter (Filter).

Background technology

Bidirectional light receiving and transmitting module (Bi-Di TRx, Bi-directional WDM Transceiver Module), be meant at a single-mode fiber (SMF, Single Mode Fiber) in, can send and receive the light source of twice different wave length (1550/1310nm) simultaneously, and reach the module design of transmitted in both directions.The design of this kind transmitted in both directions can increase the use of optical fiber frequency range, compared to the design of traditional double Optical Fiber Transmission module, not only can save the use of an optical fiber, and can dwindle the module volume, increases machine room for the highdensity use of frequency range.

Figure 1 shows that known Bi-Di TRx synoptic diagram, mainly by laser diode 11 (LD, Laser Diode), PIN light sensitive diode 12 (PD, PIN Photo Diode), partial wave multiplexer 13 (WDM, WavelengthDivision Multiplexer) and wave filter 14 (Filter) mutual group be loaded on module shell 17 and constitute, can see through fibre-optical splice 15 (as Receptacle, Pigtail) connection single-mode fiber 16 (SMF, Single Mode Fiber) and carry out two-way signal transmission.

The principle of work of Bi-Di TRx is to be light emitting source with LD11, receives the electric signal by driving circuit (Driver) output, is converted to wavelength X ₁Send behind the light signal of (as 1550nm); And be photosensitive device with PD12, receive wavelength X ₂The light signal of (as 1310nm), and be converted to electric signal, via changeing impedance amplifier (TIA, Transimpedance Amplifier) electric signal is amplified output again.WDM13 among Fig. 1 is to be used for separating λ ₁And λ ₂The light source of twice different wave length, the λ that allows LD11 send ₁The light signal is penetrated WDM13 arrival SMF16 and is sent; And the λ that SMF16 transmitted ₂The light signal then through the WDM13 reflection, sees through Filter14 again, is received by PD12, uses the transmitted in both directions purpose that reaches dual wavelength.Put Filter14, can make PD12 only can receive λ ₂Light signal and get rid of λ ₁The light signal is used the purpose that reaches reduction Optical Cross-Talk.

Shown in Figure 2, be one of located by prior art of Bi-Di TRx assembling, wherein WDM13 and LD11 (TO-CAN encapsulation) place earlier in the module shell 17, with fibre-optical splice 15 in SMF16 (Aligrment) back of harmonizing fixing, refill at last and join PD12 and harmonized.Present known Bi-Di TRx package technique when assembling WDM, all as shown in Figure 2, after must installing in advance, is just assembled other assembly and is carried out adjustment work, makes the whole Bi-Di TRx assembling flow path complexity that seems; And WDM directly is fixed in the module shell of Bi-Di TRx, and the fixing and adjustment work of WDM is difficulty comparatively.Therefore, be necessary to be improved at located by prior art.

The utility model content

For in response to the demand, the utility model is the fixed sturcture of a kind of bidirectional light receiving and transmitting module of design, be by two sides outer wall at module shell opposite face, respectively dig a perforate, and connect between two perforates, to put into and fixedly to comprise the optics module of partial wave multiplexer (WDM, Wavelength Division Multiplexer) and wave filter (Filter).The perforate that the utility model utilization connects is to put into and to fix the fixed sturcture of the optics module of integrating WDM and Filter, not only can simply and accurately harmonize location between (Alignment) WDM, Filter and LD, PD, the SMF, and via mode such as sticking together, optics module two ends are separately fixed in the perforate on module shell both sides, will than located by prior art only an end fixedly the mode of the carrier of WDM is more apparent firmly, thereby reach the purpose of improving located by prior art.

For reaching above-mentioned purpose, the utility model proposes the fixed sturcture of a kind of bidirectional light receiving and transmitting module (Bi-Di TRx), the two sides outer wall that it is characterized in that the module shell of this bidirectional light receiving and transmitting module, respectively be provided with a perforate, comprise a partial wave multiplexer (WDM in order to put into, and fixed Wavelength Division Multiplexer) and the optics module of a wave filter (Filter).

The fixed sturcture of bidirectional light receiving and transmitting module as described, wherein the two sides outer wall of this module shell is the two sides outer wall for opposite face.

The fixed sturcture of bidirectional light receiving and transmitting module as described wherein connects between these perforates, to hold this optics module.

The fixed sturcture of bidirectional light receiving and transmitting module as described, wherein the angle between this partial wave multiplexer and this wave filter is 45 degree.

The fixed sturcture of bidirectional light receiving and transmitting module as described, wherein this optics module must allow one first smooth signal to be able to enter from the outside, and after passing through this partial wave multiplexer, leave this optics module on mechanism design.

The fixed sturcture of bidirectional light receiving and transmitting module as described, wherein this optics module must allow one second smooth signal to be able to enter from the outside on mechanism design, and via the reflection of this partial wave multiplexer, pass through this wave filter again after, leave this optics module.

The fixed sturcture of bidirectional light receiving and transmitting module as described, wherein the two ends of this optics module can be separately fixed in two perforates of this module shell.

Description of drawings

Fig. 1: known Bi-Di TRx synoptic diagram;

Fig. 2: the located by prior art of Bi-Di TRx assembling;

Fig. 3: the fixed sturcture synoptic diagram of the bidirectional light receiving and transmitting module of the utility model preferred embodiment;

Fig. 4: optics module 31 has been fixed on the synoptic diagram in the module shell 32;

Fig. 5: the Bi-Di TRx work synoptic diagram of the utility model preferred embodiment;

Fig. 6: the schematic appearance of the Bi-Di TRx fixed sturcture of the utility model preferred embodiment;

Fig. 7: the sectional view of the Bi-Di TRx fixed sturcture of the utility model preferred embodiment.

In the accompanying drawing:

11: laser diode (LD, Laser Diode)

12:PIN light sensitive diode (PD, PIN Photo Diode)

13: partial wave multiplexer (WDM, Wavelength Division Multiplexer)

14: wave filter (Filter) 15: fibre-optical splice

16: single-mode fiber (SMF, Single Mode Fiber)

17: the module shell

31: optics module 311: partial wave multiplexer (WDM)

312: wave filter (Filter)

32: module shell 321: perforate

λ ₁, λ ₂: the light signal of specific wavelength (as 1550,1310nm)

Embodiment

See also Fig. 3, be the fixed sturcture synoptic diagram of the bidirectional light receiving and transmitting module of the utility model preferred embodiment.As shown in the figure, bidirectional light receiving and transmitting module (Bi-Di TRx, Bi-directional WDM Transceiver Module) is loaded on module shell 32 by laser diode 11 (LD, Laser Diode) and PIN light sensitive diode 12 (PD, PIN Photo Diode) mutual group; And partial wave multiplexer 311 (WDM, Wavelength DivisionMultiplexer) and wave filter 312 (Filter) then are arranged in the optics module 31.The two sides outer wall of module shell 32 respectively leaves between 321, two perforates 321 of a perforate and connects, and its effect is in order to putting into optics module 31, and is fixed in the module shell 32.Figure 4 shows that optics module 31 has been fixed on the synoptic diagram in the module shell 32.

See also Fig. 5, be the Bi-Di TRx work synoptic diagram of the utility model preferred embodiment.As shown in the figure, optics module 31 makes behind the correct location of WDM311 and Filter312 through suitable adjustment (Alignment), is fixed in the module shell 32.WDM311 is located in the optics module 31 λ that allows LD11 send with 45 degree oblique angles ₁Light signal (the first smooth signal) is penetrated WDM311 arrival SMF16 and is sent; And the λ that SMF16 transmitted ₂Light signal (the second smooth signal) then through the WDM311 reflection, through behind the Filter312 filtered noise, is received by PD12 again.In addition, in order to allow λ ₁And λ ₂The light signal is passed through WDM311 and the Filter312 in the optics module 31 as shown in figure, and optics module 31 should leave perforate on the mechanism design on outer wall, and in inside channel is set, and makes λ ₁And λ ₂The light signal is able to transmit between LD11, PD12 and SMF16 by WDM311 and Filter312.

Figure 6 shows that the schematic appearance of the Bi-Di TRx fixed sturcture of the utility model preferred embodiment, optics module 31 can be via mode such as sticking together, its two ends are separately fixed in the perforate 321 (another side perforate 321 cresteds) of module shell 32 both sides outer walls, the located by prior art of comparison diagram 2, the mode that the carrier of WDM12 is only at one end fixing, fixed sturcture of the present utility model is obviously comparatively firm.The sectional view of the Bi-Di TRx fixed sturcture of the utility model preferred embodiment shown in Figure 7 can be known WDM311 and the Filter312 that understands in the optics module 32 by this figure, with the relation on mechanism position between LD11, PD12 and the fibre-optical splice 15.

In sum, the utility model is to propose to improve at located by prior art, by on the two sides outer wall of the module shell opposite face of Bi-Di TRx, respectively dig a perforate, and connect between two perforates, to put into and fixedly to comprise the optics module of partial wave multiplexer (WDM, Wavelength Division Multiplexer) and wave filter (Filter).And progressive of the present utility model is, assembles WDM and Filter in the module mode, and not only moulding is simple and handling ease, helps to manufacture; And take two sides outer wall at Bi-Di TRx module shell, the perforate that setting connects is to put into and to fix the fixed sturcture of the optics module of integrating WDM and Filter, not only can simply and accurately harmonize location between (Alignment) WDM, Filter and LD, PD, the SMF, and via mode such as sticking together, optics module two ends are separately fixed in the perforate on module shell both sides, compared with located by prior art only-the fixing mode of the carrier of WDM of end, fixed sturcture of the present utility model is more apparent firm.Therefore, progressive of the present utility model is conspicuous.

The disclosed technology of the utility model must implement according to this by haveing the knack of the present technique personage, and its unprecedented practice also possesses patentability, and the whence proposes the application of patent in accordance with the law.Only the above embodiments still are not enough to contain the claim of the utility model institute desire protection, therefore, file an application claim such as attached.

Claims

1, a kind of fixed sturcture of bidirectional light receiving and transmitting module is characterized in that, the two sides outer wall of the module shell of this bidirectional light receiving and transmitting module respectively is provided with a perforate, in order to putting into the optics module that comprises a partial wave multiplexer and a wave filter, and is fixed.

As the fixed sturcture of 1 described bidirectional light receiving and transmitting module of claim the, it is characterized in that 2, wherein the two sides outer wall of this module shell is the two sides outer wall for opposite face.

3, as the fixed sturcture of 1 described bidirectional light receiving and transmitting module of claim the, it is characterized in that, wherein connect between these perforates, to hold this optics module.

As the fixed sturcture of 1 described bidirectional light receiving and transmitting module of claim the, it is characterized in that 4, wherein the angle between this partial wave multiplexer and this wave filter is 45 degree.

As the fixed sturcture of 1 described bidirectional light receiving and transmitting module of claim the, it is characterized in that 5, wherein this optics module must keep suitable channel so that laser diode institute isolychn can enter in the fibre-optical splice on mechanism design.

As the fixed sturcture of 1 described bidirectional light receiving and transmitting module of claim the, it is characterized in that 6, wherein this optics module must keep suitable passage so that can arrive at light sensitive diode via the light of fibre-optical splice incident on mechanism design.

As the fixed sturcture of 1 described bidirectional light receiving and transmitting module of claim the, it is characterized in that 7, wherein the two ends of this optics module can be separately fixed in two perforates of this module shell.