CN1239895C

CN1239895C - Detecting and assembling method for optical fibre receiver-transmitter optical submoudle

Info

Publication number: CN1239895C
Application number: CNB031309380A
Authority: CN
Inventors: 邓兆展; 朱翊麟
Original assignee: E Pin Optical Industry Co Ltd
Current assignee: E Pin Optical Industry Co Ltd
Priority date: 2003-05-08
Filing date: 2003-05-08
Publication date: 2006-02-01
Anticipated expiration: 2023-05-08
Also published as: CN1548938A

Abstract

The present invention discloses a detection and assembly method for an optical sub-module of an optical fiber receiver/emitter. The optical sub-module of the detection and assembly method comprises an outer casing body, and both the front end and the rear end of the outer casing body have through holes respectively used for assembling a functional component and an optical fiber. A lens is arranged between the optical fiber and the functional component. When the functional component is assembled in the detection and assembly method, an image detector is used so that the focus point of the sampling lens of the image detector is adjusted to be in the same plane with the coupling plane of the optical fiber. An image is directly used as a detection target, which is presented on the coupling plane when a luminescent plane or a receiving plane of the functional component passes though the lens. Thus, the position of the functional component arranged in the outer casing body is aligned and fixed. Since the imaging alignment detection of the luminescent plane or the receiving plane is directly carried out on the optical fiber coupling plane, the disadvantage that the position of the functional component is aligned through optical fiber coupling efficiency after optical fibers are capped and arranged in the traditional technology is avoided. Furthermore, the present invention can optimize the transmission bandwidth of optical fibers, especially multimode optical fibers.

Description

The detection of fiber optical transceiver optical secondary module and assemble method

Technical field

The present invention relates to a kind of fiber optical transceiver optical secondary module (OSA, Transceiver OpticalSub-Assembly) detection and assemble method, more particularly, relate to a kind of image detector that utilizes and make sampling camera lens focus furnishing and optical coupling face copline, and directly utilize the light-emitting area of functional module or receiving plane to pass lens and the image of being presented in coupling surface as detected object, aim at the detection and the assemble method of contraposition functional module is carried out the non-fiber formula.

Background technology

In photoelectricity transmission, optical secondary module (the OSA of fiber optical transceiver, Transceiver OpticalSub-Assembly), can be divided into transmitter optical secondary module TOSA (Transceiver Optical Sub-Assembly) and receiver optical secondary module ROSA (ReceiverOptical Sub-Assembly) with the difference of functional module, wherein, TOSA is used to provide functional module to optical fiber, to optical fiber, make electric signal (Electrical Signal) convert light to and as semiconductor laser or light emitting diode through lens focus transmission again in optical fiber; ROSA is used to provide optical fiber to photodetector, makes light convert electric signal to; Reversible (bi-direction) or duplexing formula (duplex) optical secondary module that TOSA and ROSA are integrated are also arranged except single worker's formula (simplex), one-way fashion (uni-direction) optical secondary module at present.

Optical secondary module (OSA, Optical Sub-Assembly) so far through research and development, existing multiple different method for making, wherein utilize the method for making of transparent heat molding material and mat plastics ejection forming technique to become main flow because of cost is lower, comprise U.S. Pat 5,631,991, [PLASTIC OPTICALSUBASSEMBLLES FOR LIGHT TRANSFER BETWEEN AN OPTICAL FIBER AND ANOPTOELECTRIC CONVERTER AND THE FABRICATION OF SUCH PLASTIC OPTICALSUBASSMBLLIES]; Or US6,432,733 B1[METHOD FOR PRODUCING AN OPTICALMODULE], and US6,302,596 B1[SMALL FORM FACTOR OPTOELECTRICTRANSCEIVERS], as shown in Figure 1, however above-mentioned conventional art has following point and shortcoming during fabrication:

1. the shell body A2 of optical secondary module A1 is the single type structure of one ejection formation, the one end is provided with the hole A3 for assembling optical fiber 20 usefulness, and the other end is provided with the hole A4 for assembling function assembly 30 usefulness, is provided with a lens A5 between hole A3 and hole A4, these lens A5 can be one-body molded with shell body A2, as shown in Figure 1, can be not one-body molded yet, as US5,631,991 or US6,432, shown in the 733B1; Since the mould of shell body A2 to offer difficulty higher, also be difficult to control the moulding quality of its ejection formation body, especially the quality of the lens face A6 of the lens A5 shown in Fig. 1, thereby influence the quality of finished of optical secondary module A1, product qualified rate is reduced, increase the trouble of calibration or assembling operation simultaneously, relatively increased cost.

2. the traditional detection mode of optical secondary module A1 generally is to come the position of adjusting function assembly by optical coupling efficiency, promptly when functional module is assembled in shell body, optical fiber has been set in the A3 of hole, utilize detecting instrument mat optical coupling efficiency to come the position of adjusting function assembly by optical fiber end again, to aim at contraposition adjustment operation, even need adjust the focus point size and location of laser beam behind lens A5 of functional module this moment according to specification, and be coupled to the optical fiber end that is assembled in the A3 of hole, and finish the finished product (with reference to the specification of the relevant Launched power of the TIA/EIA-455-203 of international telecommunication association distribution measurementprocedure for graded-index multi-mode fiber transmitters) that meets the specification; Yet should tradition adjustment detection operation be to utilize detecting instrument to cooperate the optical fiber end of having assembled, the mat optical coupling efficiency comes the position of adjusting function assembly, be not that the size of direct mat light beam and position are with optimization Optical Fiber Transmission frequency range, therefore, this mode is difficult to reach effectively and accurate the detection, easily influences the quality of finished of optical secondary module A1.

3. the detection mode that above-mentioned still more mat optical coupling efficiency comes the adjusting function module position, potential have a lot of changes that influence testing result because of, as: the optical fiber quality all has certain tolerance to exist, and the quality of functional module is not fixed (emissive power as laser diode is exactly non-constant remaining unchanged) yet, easily cause the error of TOSA finished product detection quality, attempt example explanation: detect qualified finished product in a conventional manner and be to be based upon fully and carry out functional module and aim at the emissive power of the used at that time functional module of contraposition operation or the quality specification of used optical fiber, therefore detect qualified finished product in a conventional manner, its qualified quality might be only effective to used at that time functional module or optical fiber, if use in the different time different location, be that the user changes slotting other optical fiber, then because of before, the optical fiber that use the back has error range, may have the quality condition of poor takes place, thereby cause quality of finished to grasp really, qualification rate can't be improved, and cost improves relatively.

At shell body A2 in above-mentioned the 1st is the shortcoming of one ejection formation single type structure, creator of the present invention has done improvement, shell body is designed to the structure of two-piece type, as shown in Figures 2 and 3, the shell body of this optical secondary module is made up of one first shell body B1 and two housings of one second shell body B2, the end of the first shell body B1 is provided with for linking the hole B3 that optical fiber B4 uses, the corresponding end of the second shell body B2 is provided with for linking the hole B5 that functional module B6 uses, this shell body is the structure of two-piece type and has applied for the Taiwan patent, application number is 92200404, but no matter shell body is single type structure or two-part construction, still faces the problem that has in the above-mentioned the 2nd and the 3rd on making.

Summary of the invention

Fundamental purpose of the present invention is to provide detection and the assemble method of a kind of fiber optical transceiver optical secondary module that can effectively address the above problem (Transceiver Optical Sub-Assembly).

The detection of fiber optical transceiver optical secondary module and assemble method are in functional module is sheathed on the hole of shell body and when carrying out assembling operation among the present invention, utilize an image detector that the focus of its sampling camera lens is adjusted to and the optical coupling face copline, and directly utilize light-emitting area on the functional module or receiving plane to pass lens and the image of being presented in coupling surface as detected object, to carry out the aligning contraposition of functional module in shell body with fixing.

Detection among the present invention and assemble method are because the image that directly is imaged on the optical coupling face at the light-emitting area or the receiving plane of functional module when the assembling function assembly is calibrated testing, so the shortcoming that can avoid traditional approach to produce, effectively improve product qualified rate, and simplify the detection operation of finished product and help producing in batches.

In addition, detection among the present invention and assemble method are owing to directly utilize the light-emitting area of functional module on the optical coupling face or image that receiving plane presented as detected object, to calibrate testing, therefore can not necessarily need at the multimode optical fiber Coupling point in the specification of fiber cores (Core) central point, and be the distribution of optimization coupled fiber mode, reduce modal dispersion, and the transmitting bandwidth of optimization multimode optical fiber is reached the optimum detection quality.

Description of drawings

Below in conjunction with accompanying drawing the specific embodiment among the present invention is described in further detail.

Fig. 1 is the structural profile synoptic diagram of the conventional enclosure body optical secondary module that is single type;

Fig. 2 is the structural profile synoptic diagram of the optical secondary module that shell body is two formulas among the present invention;

Fig. 3 is the combination synoptic diagram of optical secondary module shown in Fig. 2;

Fig. 4 A is the structural profile synoptic diagram of optical secondary module when the assembling function assembly that shell body is single type among the present invention;

Fig. 4 B is that optical secondary module shown in Fig. 4 A utilizes the synoptic diagram when method detects among the present invention;

Fig. 5 A is the structural profile synoptic diagram of optical secondary module when the assembling function assembly that shell body is two formulas among the present invention;

Fig. 5 B is that optical secondary module utilizes synoptic diagram when method detects among the present invention among Fig. 5 A;

Fig. 6 is that shell body is single type and functional module is the structural profile synoptic diagram of the optical secondary module of uncovered (cap) laser diode SMTTYPE among the present invention.

Embodiment

As Fig. 1, Fig. 4 A, Fig. 4 B, shown in, at the shell body of single type structure, detection and assemble method among the present invention may further comprise the steps:

(1) utilize the technology of plastics ejection formation that one shell body (Housing) 10 is provided, this shell body 10 is the single type structure, this structure and traditional single type structure proximate, and as US5,631,991, US6,432,733B1 and US6,302, the structure shown in the 596B1.One end of shell body 10 is provided with the hole 11 for assembling optical fiber 20 usefulness, the other end is provided with the hole 12 for assembling function assembly 30 usefulness, and functional module 30 has different assembling kenel and function, as laser or light emitting diode, photodetector, also comprise the TO-Can encapsulation laser diode or the uncovered laser diode SMT type (bare chip LD) that contain lid (cap); Be provided with lens 13 between hole 11 and hole 12, these lens 13 can be one-body molded with shell body 10, as shown in Figure 1, can be not one-body molded yet, as US5,631,991 or US6, shown in 432,733 B1;

(2) carry out functional module 30 earlier and be sheathed on assembling operation in the hole 12 of shell body 10, aligning contraposition (detection) mode in this assembling operation is to utilize an image detector 40, the focus of its sampling camera lens 41 is adjusted to and optical coupling face 21 (being the stopping surface Stop Face14 of 11 the inners, hole) copline, and utilize light-emitting area 31 (at TOSA) on the functional module 30 or receiving plane (at ROSA) to pass lens 13 and the image of being presented in optical coupling face 21 (being the stopping surface 14 of optical fiber 20) as detected object, carrying out the aligning contraposition of functional module 30 in shell body 10, and then assembling is finished.

Shown in Fig. 2, Fig. 3, Fig. 5 A and Fig. 5 B, at the shell body of two-part construction, detection and assemble method among the present invention may further comprise the steps below:

(1) utilize the plastics ejection forming technique that one shell body 50 is provided, this shell body 50 is a two-part construction, form by one first shell body 51 and one second shell body 52, one end of first shell body 51 is provided with for the hole 53 that links optical fiber 20 usefulness, the corresponding end of second shell body 52 is provided with for the hole 54 that links functional module 30 usefulness, be provided with lens 55 between hole 53 and hole 54, these lens 55 can be one-body molded with second shell body 51, also can be not one-body molded; First shell body 51 and second shell body 52 are after combination, and the coupling surface 21 of optical fiber 20 promptly is the stopping surface 56 of optical fiber 20 in hole 53, the binding face when this stopping surface 56 is

second shell body

52 and 51 combinations of first shell body; Because first shell body 51 and second shell body 52 all are to utilize the plastics ejection forming technique to make the fine structure of moulding, matching relationship between the two is accurate to be set, and therefore can simple and easy socket be assembled into one;

(2) carry out functional module 30 earlier and be sheathed on assembling operation in the hole 54 of second shell body 52, shown in Fig. 5 B, aligning contraposition mode in assembling operation is to utilize an image detector 40, the focus of its sampling camera lens 41 is adjusted to and optical coupling face 21 (being the stopping surface 56 of optical fiber 20) copline, and utilize light-emitting area 31 (at TOSA) on the functional module 30 or receiving plane (at ROSA) to pass lens 55 and the image of being presented in optical coupling face 21 (being the stopping surface 56 of optical fiber 20) as detected object, carrying out the aligning contraposition of functional module 30 in second shell body 52, and then assembling is finished;

(3) more above-mentioned second shell body 52 and first shell body 51 that has been assembled with functional module 30 is combined into one.

By above-mentioned detection and assemble method, make assembling processing procedure of the present invention be different from traditional approach, particularly the present invention no longer comes the assembling position of adjusting function assembly in shell body by the coupling efficiency of optical fiber as detected object, and be improved under the situation of unassembled optical fiber, utilizing an image detector that the focus of its sampling camera lens is adjusted to optical coupling face forms at grade, and utilize light-emitting area (at TOSA) on the functional module or receiving plane (at ROSA) to pass lens and the image of being presented in optical coupling face as detected object, come the position of adjusting function assembly in shell body, carrying out the aligning contraposition of functional module in shell body, so the following effect of detection among the present invention and assemble method tool:

1. no matter shell body is an also two-part construction body of single type structure, or replace the metal shell body structure of functional module with the plastic casing body, detection among the present invention and assemble method are all applicable.

The present invention directly utilize light-emitting area (at TOSA) on the functional module or receiving plane (at ROSA) to pass lens and the image of being presented in optical coupling face as detected object, and calibrate testing, thereby can effectively reduce of the harmful effect of the error of behaviour of functional module or optical fiber, improve product qualified rate quality of finished.

3. at high-speed transfer (as 10G Ethernet) and multimode optical fiber (Multi-mode Fiber) or plastic optical fiber (plastic optical fiber, POF) technical field, with the image of the light-emitting area that presented on the optical coupling face or receiving plane as detected object, can be according to need the accurate optimum position of adjustment image, but use the distribution of optimization coupled fiber mode, reduce modal dispersion, and the transmitting bandwidth of optimization multimode optical fiber.

4. no matter functional module is flat glass, oblique glass, ball glass or uncovered (cap) laser diode SMT type (bare chip LD), and is as shown in Figure 6, all applicable.

In sum, the method for making among the present invention really can the disclosed technology of mat and is reached desired effect.

In addition; though more than the preferred embodiment among the present invention is described; but can not be as protection scope of the present invention; promptly should be understood that to those skilled in the art; do not breaking away from variation and the modification that to make equivalence under the design spirit of the present invention to it; therefore, every not breaking away from the equivalence variation of having done under the design spirit of the present invention and modification, all should think to fall into protection scope of the present invention.

Claims

1. the detection of a fiber optical transceiver optical secondary module and assemble method, optical secondary module in this detection and the assemble method includes a shell body, end at shell body is provided with a hole that supplies assembling optical fiber to use, the other end is provided with another hole of using for the assembling function assembly, between two holes, be provided with lens, it is characterized in that: in the hole that functional module is placed in shell body and when carrying out assembling operation, utilize an image detector that the focus of its sampling camera lens is adjusted to and the optical coupling face copline, and directly utilize light-emitting area on the functional module or receiving plane to pass lens and the image of being presented in coupling surface as detected object, to carry out the aligning contraposition of functional module in shell body with fixing, be mat adjusting function assembly and adjust the size and location of image on optical coupling face of its light-emitting area or receiving plane, functional module aimed at link again after the contraposition fixing in shell body.

2. according to the detection and the assemble method of the fiber optical transceiver optical secondary module described in the claim 1, it is characterized in that: the single type structure that described shell body is formed in one.

3. according to the detection and the assemble method of the fiber optical transceiver optical secondary module described in the claim 1, it is characterized in that: described shell body is a two-part construction, it includes one first shell body and one second shell body, end at first shell body is provided with above-mentioned for linking the hole that optical fiber is used, corresponding end at second shell body is provided with the above-mentioned hole that supplies the binding functional module to use, and is provided with said lens between two holes.

4. according to the detection and the assemble method of the fiber optical transceiver optical secondary module described in the claim 1, it is characterized in that: described functional module is laser or light emitting diode or photodetector.

5. according to the detection and the assemble method of the fiber optical transceiver optical secondary module described in the claim 2, it is characterized in that: described lens and shell body are one-body molded.

6. according to the detection and the assemble method of the fiber optical transceiver optical secondary module described in the claim 2, it is characterized in that: described lens are not one-body molded with shell body, and are assembled in the described shell body.

7. according to the detection and the assemble method of the fiber optical transceiver optical secondary module described in the claim 3, it is characterized in that: the described lens and second shell body are one-body molded.

8. according to the detection and the assemble method of the fiber optical transceiver optical secondary module described in the claim 3, it is characterized in that: the described lens and second shell body are not one-body molded, and are assembled in second shell body.

9. according to the detection and the assemble method of the fiber optical transceiver optical secondary module described in the claim 1, it is characterized in that: described fiber optical transceiver is single worker's formula, one-way fashion, duplexing formula or reversible structure.

10. according to the detection and the assemble method of the fiber optical transceiver optical secondary module described in the claim 1, it is characterized in that: described optical fiber comprises single-mode fiber, multimode optical fiber or plastic optical fiber.