Unlock instant, AI-driven research and patent intelligence for your innovation.

Optical filter module and method for manufacturing the same

A manufacturing method and technology of optical filters, applied in optical elements, light guides, optics, etc., can solve problems such as difficulty in insertion of curved devices, loss, and large deviation of incident angle of multilayer film filters, etc.

Inactive Publication Date: 2004-02-04
PANASONIC CORP
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in this filter, because the multilayer film filter 37 must have a certain curvature, the deviation of the incident angle on the multilayer film filter caused by the installation deviation becomes large.
And, when using the buried type optical guide on the optical waveguide, in the optical filter insertion groove 36, inevitably form the gap caused by bending on the optical guide 35, 33 and the multilayer film filter 37, by this gap cause light emission from light guide paths 35 and 33 and loss
And it is very difficult to mechanically ensure that a device with a bend is inserted into the tiny groove

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical filter module and method for manufacturing the same
  • Optical filter module and method for manufacturing the same
  • Optical filter module and method for manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0027] FIG. 1A is a top view of a two-core filter assembly according to Embodiment 1 of the present invention. Fig. 1B is a side view thereof. Figure 1 C is its cross-sectional view. The assembly includes the insertion groove 1 of the multilayer film filter, the multilayer film filter 2, the upper plane substrate 3, the light passage 4, the lower plane substrate 5 and the optical adhesive 6, and the upper plane substrate 3 and the lower part V-shaped grooves 10, 11 are formed on the main surface of the planar substrate 5, respectively.

[0028] The multilayer film filter 2 has a dielectric thin film in which multiple layers of SiO2 and Ta2O5 are laminated on a resin plate such as glass or polyimide. The upper planar substrate 3 and the lower planar substrate 5 are, for example, glass and silicon, and the linear expansion coefficient of the substrates is preferably close to that of the optical channel 4 . In addition, when a resin-based adhesive is used to fix these substrat...

Embodiment approach 2

[0043] A method of manufacturing the filter unit according to Embodiment 2 will be described below with reference to FIGS. 3 and 4 .

[0044] In Fig. 3, the assembly includes: a multilayer film filter 1, an insertion groove, a multilayer film filter 2, an upper plane substrate 3, an optical fiber 4 as an optical path, a lower plane substrate 5, an optical adhesive 6. The precise V-shaped groove 10 formed on the main surface of the lower planar substrate 5 and the precise V-shaped groove 11 formed on the main surface of the upper planar substrate 3 , and the ultraviolet light source or heat source 12 .

[0045] In the method of manufacturing an optical filter assembly according to Embodiment 2, as shown in FIG. 3A , upper planar substrate 3 and lower planar substrate 5 having precision V-shaped grooves 10 and 11 formed on their respective principal planes are prepared. At this time, as the material of the planar substrates 3 and 5, it is preferable to have a linear expansion co...

Embodiment approach 3

[0057] Next, a method of manufacturing the optical filter unit according to Embodiment 3 will be described with reference to FIGS. 5A to 8I .

[0058] In the method of manufacturing an optical filter unit according to Embodiment 3, first, as shown in FIG. 5A , planar substrates 3 and 5 having precise V-grooves 10 and 11 formed on their main surfaces are prepared. As a material for the planar substrates 3 and 5, it is preferable to have a linear expansion coefficient equivalent to that of an optical fiber mounted and fixed in a later step. In addition, it is preferable to use a photocurable adhesive for the bonding of the upper and lower planar substrates 3 and 5, and to make it transparent.

[0059] Next, as shown in FIG. 5B , the optical fiber 4 is mounted and fixed on the precise V-groove 11 formed on the main surface of the upper planar substrate 3 . In this case, it is more preferable to remove the coated cladding such as resin from the optical fiber to be fixed in consid...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Precise V-grooves allowing an optical fiber to project are formed in respective main surfaces of an upper plane substrate and a lower plane substrate. The optical fiber is mounted on one plane substrate, and a multi-layer film filter (2) is inserted into a filter insertion groove (1) crossing the precise V-groove in the main surface of the other plane substrate. Then, using the projecting optical fiber and the other precise V-groove as a guide rail, two plane substrates grapple the multi-layer film filter to fix and mount the filter. In an optical filter module obtained in this manner, a process of adjusting an optical axis between input / output optical fibers is eliminated, and displacement of the inserted optical filter is reduced.

Description

technical field [0001] The present invention relates to an optical filter assembly for optical communication in which various optical filters are integrated in an optical fiber and an optical guide and its manufacturing method. Background technique [0002] In an optical information communication system using an optical fiber, light is attenuated by radiation and absorption through the optical fiber, and an optical fiber amplifier is used as a system for amplifying the attenuated light. 9A shows the composition of the system, which consists of an optical isolator 53, an erbium-doped optical fiber 51, a pump laser 54 for incident laser light for excitation, a photodiode (PO) 52 for output monitoring, and a control for adjusting gain. The optical fiber amplifier constituted by the optical filter 55 is indispensable in an optical communication network in order to amplify an optical signal without converting it into an electrical signal. [0003] The wavelength of the pump lase...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/00G02B6/34
CPCG02B6/29368
Inventor 西原和成藤原和男加藤宽治出川三喜夫岛村彻郎
Owner PANASONIC CORP