CN100502275C

CN100502275C - Wavelength division multiplexer and manufacturing method thereof

Info

Publication number: CN100502275C
Application number: CNB031140602A
Authority: CN
Inventors: 宋长志
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2003-03-26
Filing date: 2003-03-26
Publication date: 2009-06-17
Anticipated expiration: 2023-03-26
Also published as: CN1533078A

Abstract

A wavelength division multiplexer, which includes a double fiber optic head, a filter and a single fiber optic head, the double fiber optic head includes a double fiber optic ferrule and a collimating lens, the single fiber optic head includes a single fiber optic ferrule and a A collimating lens, the filter is pasted on the end face of the collimating lens of the double fiber optic head by glue, and there is an air layer between it and the double fiber optic head. The manufacturing method of the wavelength division multiplexer includes the following steps: first select a filter and detect its central wavelength; then apply a layer of glue at intervals on the end face of the collimator lens of the dual-fiber head near the edge; then paste the filter device, so as to form a non-sealed air layer between the double fiber head and the filter, and adjust the filter so that the optical signal from the first fiber of the double fiber head can be input to the double fiber head after being selected and reflected by the filter Another optical fiber; then heat to cure the glue to stabilize the combined structure; finally, the double fiber head, filter and single fiber head are placed on the optical alignment position and packaged.

Description

Wavelength division multiplexer and manufacture method thereof

[technical field]

The present invention relates to a kind of wavelength division multiplexer and manufacture method thereof, refer in particular to a kind of filtering type wavelength division multiplexer and manufacture method thereof.

[background technology]

(the Wavelength Divisi on Multiplexer of wavelength division multiplexer in optical communication system, WDM) be used for compound or decomposition different wave length light signal, development along with optical communication technique, the application of wavelength division multiplexer more and more widely, requirement to its optical property and reliability also improves day by day, and the optical property of wavelength division multiplexer largely depends on its package assembly and encapsulation technology etc., and particularly the combination of the double optical fiber head of filter and wavelength division multiplexer is to the influence of the optical property of this wavelength division multiplexer.The combination of existing filter and double optical fiber head is directly to be attached to this filter on the double optical fiber head, as United States Patent (USP) the 6th, 347, No. 170, see also Fig. 1, one wavelength division multiplexer comprises a double optical fiber head 11, one filter 12 and a single fiber head 13, this double optical fiber head 11 comprises a pair of optical fiber contact pins 111 and collimation lens 112, this single fiber head 13 comprises a single fiber contact pin 131 and collimation lens 132, after detecting screening through centre wavelength, this filter 12 is affixed on the collimating lens 112 of double optical fiber head 11 by glue 14, and aim at single fiber head 13 with double optical fiber head 11 in the lump, this combination is directly combined closely double optical fiber head 11 and filter 12, for avoiding the impaired waveform that causes of filter plated film face to be offset, in manufacture process, when the centre wavelength of filter is selected in detection for use, filter is not closely to be affixed on the double optical fiber head, generally speaking, between double optical fiber head and the filter certain intervals is arranged, there is an air layer, because this air layer is to the influence of light refraction, therefore it is different to detect the centre wavelength of gained and centre wavelength that the practical application median filter is close on the double optical fiber head, so the combination of this double optical fiber head and filter makes the center wavelength shift of wavelength division multiplexer bigger, optical property is relatively poor.

Therefore, accurate measuring center wavelength of a kind of energy and optical property be provided wavelength division multiplexer and manufacture method thereof are real preferably and be needs.

[summary of the invention]

Purpose of the present invention mainly is to provide accurate measuring center wavelength of a kind of energy and optical property wavelength division multiplexer and manufacture method thereof preferably.

The objective of the invention is to pass to down that technical scheme realizes: provide a kind of wavelength division multiplexer, it comprises: a double optical fiber head, a filter and a single fiber head, this double optical fiber head comprises a pair of optical fiber contact pins and collimation lens, this single fiber head comprises a single fiber contact pin and collimation lens, this filter is by the collimating lens end face of sticker in double optical fiber head, has an air layer between itself and this double optical fiber head.

The manufacture method of this wavelength division multiplexer may further comprise the steps: select filter earlier for use and detect its centre wavelength; Keep to the side at the end face of the collimating lens of double optical fiber head then and sentence interval mode spot printing one deck glue; Then stick this filter, thereby between double optical fiber head and filter, form a unsealed air layer, adjust filter simultaneously and make it will after filter is selected and reflected, can input to another optical fiber of this double optical fiber head from the light signal of double optical fiber head one optical fiber; Heating makes adhesive curing stablize combining structure then; At last double optical fiber head, filter and single fiber head are positioned on the optical alignment position and encapsulation.

Compared with prior art, the invention has the advantages that: some glue sticks filter again on double optical fiber head, thereby between double optical fiber head and filter, form air layer, light signal enters filter from double optical fiber head after the air layer refraction, or after the air layer refraction, enter double optical fiber head again via filter reflection, this with manufacture process in identical when detecting wavelength division multiplexer centre wavelength, so accurate measuring center wavelength of energy, and then restriction center wavelength shift, the control yield reaches optical property preferably.

[description of drawings]

Fig. 1 be existing wavelength division multiplexer double optical fiber head and filter in conjunction with schematic diagram

Fig. 2 is the schematic diagram of wavelength division multiplexer manufacture method of the present invention when not pasting filter.

Fig. 3 is the schematic diagram of wavelength division multiplexer manufacture method of the present invention when sticking filter.

Fig. 4 is that some glue illustrated before wavelength division multiplexer manufacture method of the present invention was sticked filter.

[embodiment]

Please refer to Fig. 2 and Fig. 3, wavelength division multiplexer of the present invention comprises a double optical fiber head 21, a filter 22 and a single fiber head 23, this double optical fiber head 21 comprises a pair of optical fiber contact pins 211 and collimation lens 212, this single fiber head 23 comprises a single fiber contact pin 231 and collimation lens 232, and this filter 22 is affixed on collimating lens 212 end faces of double optical fiber head 21 by glue 24.

Please together with reference to Fig. 2 and Fig. 4, this glue 24 is end face that spaced points is coated in collimating lens 212 places that keep to the side, and the tool certain thickness, make to form a unsealed air layer between double optical fiber head 21 and the filter 22, wherein this glue 24 can be 353ND glue or other thermoplastics.

Wavelength division multiplexer step of manufacturing of the present invention comprises: select filter earlier for use and detect its centre wavelength, during detection, for avoiding impaired waveform skew, the filter 22 and one of checkout gear double optical fiber head (figure does not show) and a single fiber head (figure does not show) certain space of being separated by of causing of filter 22 plated film faces.Behind inspection center's wavelength, the end face of the collimating lens 212 in double optical fiber head 21 keeps to the side and sentences interval mode spot printing one deck glue 24, and then stick filter 22, thereby form unsealed air layer at double

optical fiber head

21 and 22 in filter, adjusting filter 22 simultaneously makes it light signal from double optical fiber head 21 1 optical fiber (indicating) can be able to be inputed to another optical fiber (indicating) of this double optical fiber head 21 after filter 22 is selected and reflected, then heating makes glue 24 curing stablize combining structure, this double optical fiber head 21 at last, filter 22 and single fiber head 23 are on the optical alignment position, and are packaged in the sleeve (figure does not show).

Light signal is to enter filter 22 from double optical fiber head 21 after the air layer refraction, or after the air layer refraction, enter double optical fiber head 21 again via filter 22 reflection, this situation with previous inspection center wavelength is identical, therefore the centre wavelength of measuring gained is consistent with the centre wavelength that is applied to this wavelength division multiplexer, and then restriction center wavelength shift, the control yield reaches optical property preferably.

For avoiding the thermal expansion of air chance to cause glue 24 influenced generation deformation or splitting, point glue mode is painted with good with spaced points, but, this glue mode is not unique execution mode of the present invention, other spot printings can form air layer equally between double optical fiber head 21 and filter 22, so that the practical center wavelength of this wavelength division multiplexer centre wavelength when detecting is consistent.

Claims

1. A wavelength division multiplexer, comprising: a double fiber optic head, a filter and a single fiber optic head, the double fiber optic head includes a pair of fiber optic pins and a collimating lens, the single fiber optic head includes a single fiber optic plug The needle and a collimating lens are characterized in that the filter is glued to the end face of the collimating lens of the double fiber optic head, and an air layer is formed between the filter and the double fiber optic head.

2. The wavelength division multiplexer according to claim 1, characterized in that the glue is applied at intervals near the edge of the end face of the collimator lens.

3. The wavelength division multiplexer as claimed in claim 2, wherein a non-sealed air layer is formed between the filter and the dual optical fiber head.

4. The wavelength division multiplexer as claimed in claim 3, characterized in that the glue is 353ND glue.

5. The wavelength division multiplexer as claimed in claim 1, wherein the glue is thermoplastic.

6. A method for manufacturing a wavelength division multiplexer, characterized in that it comprises the following steps: select a filter for use and detect its central wavelength; then glue on the double-fiber head; then paste the filter, so that the double-fiber An air layer is formed between the head and the filter, and the filter is adjusted at the same time; then the glue is heated to cure and stabilize the combined structure; finally, the double-fiber head, the filter and the single-fiber head are aligned and packaged.

7. The manufacturing method of the wavelength division multiplexer according to claim 6, wherein the glue point is near the edge of the collimating lens end face of the dual-fiber head.

8. The manufacturing method of a wavelength division multiplexer as claimed in claim 7, wherein the glue is applied at intervals so as to form a non-sealed air layer between the dual optical fiber head and the filter.

9. The manufacturing method of wavelength division multiplexer as claimed in claim 8, characterized in that the filter is adjusted so that the optical signal from the optical fiber of the dual optical fiber head can be input to the dual optical fiber head after being selected and reflected by the filter another fiber.

10. The manufacturing method of the wavelength division multiplexer according to claim 9, characterized in that the double-fiber head, the filter and the single-fiber head are collimated and packaged in the sleeve.