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Comb filter for multiwavelength laser system

A multi-wavelength laser and comb filter technology, applied in the field of filters, can solve the problem of lack of channel width tunability, etc., and achieve the effects of channel width tunability, good channel flatness, and high isolation.

Inactive Publication Date: 2005-11-23
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The filter with this structure has the advantages of simple design and fabrication and low insertion loss, but it does not have the tunability of channel width

Method used

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  • Comb filter for multiwavelength laser system

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Experimental program
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Effect test

Embodiment

[0016] The first step, filter design

[0017] Assume that the central working wavelength of the filter is 1.55 μm, and the channel width is 100 GHz. A high refractive index optical glass ZF6 (n=1.7355) is selected as the intermediate waveguide layer medium (1), and its thickness is designed to be 0.9 mm. The upper metal film (2) is made of gold (Au), and its thickness is designed to be 25nm. The material of the lower metal film 3 is the same as that of the upper metal film, and the thickness is designed to be more than 200nm. The incident angle θ is designed to be 24.2°. It can meet the requirement of 100G channel width, if any

[0018] The deviation adjusts the angle of incidence.

[0019] The second step, the production of the filter

[0020] The ZF glass is processed into a thin slice with a thickness of 0.9mm and polished, and its parallelism is required to be less than 20’. Gold (Au) with a thickness of 25 nm is plated on one side of the ZF glass sheet by ion beam s...

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Abstract

This invention relates to a comb filter used in multi-wave laser in the light communication field, which coats one upper layer and down layer of metal film on one medium film to form one double metal medium waveguide, wherein, the said medium film is parallel with less than 20 degrees; the said metal film is of wavelength less than the medium film; the said down metal layer with less thickness than the medium film determined by the thickness of the medium film as c / 2í¸V.

Description

technical field [0001] The invention relates to a filter in the technical field of optical communication, in particular to a comb filter used in a multi-wavelength laser system. Background technique [0002] With the advent of the information age, people's demand for information transmission is increasing exponentially, especially the rapid development of the Internet, which puts forward higher requirements for communication bandwidth. In order to use the existing optical fiber network to achieve the purpose of capacity expansion, scientists and technicians have developed wavelength division multiplexing (WDM) and dense wavelength division multiplexing (DWDM) technologies. The basic principle is to simultaneously couple multiple optical signals into an optical fiber to transfer. Due to the development of WDM and DWDM technology, new requirements are put forward for the laser light source, and a laser light source that can generate multiple wavelengths at the same time is ur...

Claims

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Application Information

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IPC IPC(8): H04J14/02
Inventor 陆海峰曹庄琪李红根沈启舜邓晓旭
Owner SHANGHAI JIAO TONG UNIV