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Tapered optical fiber annular cavity optical comb type wavelength-division multiplexer and method of manufacture

A technology of wavelength division multiplexer and optical add-drop multiplexer, which is applied in the direction of wavelength division multiplexing system, optical waveguide coupling, electromagnetic wave transmission system, etc., can solve the problems of large and rare insertion loss, and achieve small wavelength loss , Narrow spectral line bandwidth, convenient processing

Inactive Publication Date: 2008-11-19
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Of course, the optical cross wavelength division multiplexer can also be cascaded with three or even four levels, but its insertion loss is relatively large, and its practical application is relatively rare.

Method used

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  • Tapered optical fiber annular cavity optical comb type wavelength-division multiplexer and method of manufacture
  • Tapered optical fiber annular cavity optical comb type wavelength-division multiplexer and method of manufacture
  • Tapered optical fiber annular cavity optical comb type wavelength-division multiplexer and method of manufacture

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Embodiment 1, as shown in Fig. 3, a tapered fiber ring cavity optical comb wavelength division multiplexer, which includes an optical fiber 2, a ring cavity 3, and the outer diameter of the cross section 31 in the level of the ring cavity 3 is larger than the diameter of the optical fiber 2. Each optical fiber is drawn into a tapered shape in the middle to form a tapered optical fiber. The diameter of the optical fiber 2 is 125μm, the diameter of the tapered waist 21 is 2.0μm, and the radius of the ring cavity 3 R = c 2 πFSR = c 2 πnΔυ μm , Where Δυ is the channel spacing, C is the speed of light in vacuum, n is the refractive index of the medium used to make the ring cavity, and FSR is the free spectral range of the ring cavity resonance spectrum.

[0041] Take C=3.0*10 8 m / s, n=1.465 π=3...

Embodiment 2

[0047] Example 2, such as Figure 4 As shown, a tapered fiber ring cavity optical comb wavelength division multiplexer is composed of a tapered fiber made of two optical fibers 2, a ring cavity 3, and a carrier substrate 1. The ring cavity 3 is directly made on the carrier substrate. On the sheet 1, there are two parallel V-shaped grooves 11 and an annular cavity 3 etched on the supporting substrate 1. The width of the top of the V-shaped groove 11 is 1.22 times the outer diameter of the optical fiber. The diameter of the optical fiber 2 is 125μm, and the tapered waist is 21. The diameter is 2.0μm, the radius of the annular cavity 3 R = c 2 πFSR = c 2 πnΔυ μm , Where Δυ is the channel spacing, C is the speed of light in vacuum, n is the refractive index of the medium used to make the ring cavity,...

Embodiment 3

[0071] Example 3, such as Picture 9 As shown, a tapered fiber ring cavity optical comb wavelength division multiplexer is composed of a tapered fiber made of three optical fibers 2, two ring cavities 3 of different sizes, and a carrier substrate 1. Three parallel V-shaped grooves 11 and two annular cavities 3 are etched. The optical fibers 2 and the annular cavity 3 are spaced apart. The tapered waists 21 of the two adjacent optical fibers are tangent to the outer circle 32 of the horizontal section 31 of the annular cavity 3. The distance between the centers of the two V-shaped grooves is the sum of the diameter of the outer ring of the ring cavity 3 in the middle and the diameter of the tapered fiber waist 21. The negative photoresist is used for photolithography, and the transparent area pattern of the mask is as follows Picture 9 The shaded part shown. The tapered fiber ring cavity optical comb wavelength division multiplexer can simultaneously divide and multiplex two sets ...

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Abstract

The invention belongs to a device of photoconduction and other optical elements, in particular to a tapered optical fiber ring cavity optical comb wavelength division multiplexer provided with a multiple wavelength selection and division multiplexing functional device, and a manufacturing method thereof. The invention is a tapered optical fiber ring cavity optical comb wavelength division multiplexer which is structurally characterized in that the wavelength division multiplexer comprises optical fibers and a ring cavity, and the external diameter of the horizontal middle section of the ring cavity is greater than the diameter of each optical fiber. Each optical fiber is drawn into a cone type with a thin middle part to form a tapered optical fiber, the optical fibers and the ring cavity are in the spaced arrangement, and tapered waists of every two adjacent optical fibers are tangent to the ex-circle of the horizontal middle section of the ring cavity. The wavelength division multiplexer has the advantages of convenient and simple input and output optical processing, compact structure, higher coupling efficiency, small channel loss, realizable optical integration and industrial production, and good practicality. Tests tell that the coupling efficiency between resonant wavelength tapered optical fibers and beams in the ring cavity can reach 90 percent.

Description

Technical field [0001] The invention belongs to devices of light guides and other optical elements, in particular to a tapered fiber ring cavity optical comb wavelength division multiplexer with a multi-wavelength selective division multiplexing function device and a manufacturing method thereof. Background technique [0002] The optical comb-add / drop multiplexer (OCADM) of the present invention is an optical router used in a dense wavelength division multiplexing (DWDM) system in optical fiber communication. An optical passive device. The use of an optical comb wavelength division multiplexer can increase the number of optical fiber communication dense wavelength division multiplexing channels. It can further reduce the channel spacing and increase the system channel density on the basis of the existing filter bandwidth. The demultiplexing function of the optical comb wavelength division multiplexer is to decompose a single group of input dense wavelength division multiplexing (...

Claims

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Application Information

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IPC IPC(8): G02B6/28H04B10/12H04J14/02
Inventor 黄衍堂
Owner FUZHOU UNIV
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