Comb filter/comb multiplexer with thermal stability
A comb filter and thermal stability technology, which is applied in the field of comb filter/comb multiplexer, can solve the problem of reducing the number of channels used in optical communication, and achieve the effects of simple structure, reduced complexity, and small device size
Active Publication Date: 2014-12-10
AOC TECH (WUHAN) CO LTD
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These deficiencies will lead to a reduction in the number of channels used by optical communication, which is far less than its theoretical maximum number of channels
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[0017] The invention includes the Fabry-Perot etalon, which has the same size as the etalon without thermal compensation device, and can achieve the purpose of heat dissipation difference.
[0018] The etalon in the present invention can divide the closely spaced optical wavelength channels into two or more groups of evenly spaced optical channels according to the comb shape, and each channel or each group of channels is separated and equally spaced.
[0019] The etalon in the present invention can insert a plurality of optical wavelength channels with intervals into a single optical channel containing optical wavelengths with finer intervals in a comb shape.
[0020] The etalon described in the present invention is filled with two or more different transparent materials in the Fabry-Perot cavity, and multiple transparent materials can be selected according to the description below. An etalon that does not require adjustment is composed of a material with a predefined thermal ...
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The invention provides a comb filter / comb multiplexer with thermal stability. Three optical mediums are filled between two reflecting surfaces of an etalon, a heat expansion coefficient of one optical medium counteracts a refraction index temperature coefficient of another optical medium, and a heat expansion coefficient of the third optical medium along a shaft counteracts a refraction index temperature coefficient along the other shaft or two optical mediums adopt the same material, the heat expansion coefficients of the two optical mediums adopting the same material counteract the refraction index temperature coefficient of the other optical medium or the refraction index temperature coefficients of the two optical mediums adopting the same material counteract the heat expansion coefficient of the other optical medium. The invention extremely stabilizes the transmission and reflection characteristics of single or multiple wavelengths in the temperature change range of optical elements. The invention can achieve the athermalization aim of the etalon in a passive mode.
Description
technical field [0001] The present invention relates to a comb filter / comb multiplexer with thermal stability, which can divide wavelength division multiplexed channels into two groups of odd and even channels, so that the signal interval can be doubled, and can also multiplex the channels of the odd and even groups. Use to reduce the signal interval. The invention is suitable for the field of optics, especially relates to the field of etalons. Background technique [0002] In the field of optical communication, optical signals with a wavelength interval of less than 1nm are often transmitted through optical fibers or free-space optical channels. Each wavelength carries a kind of data information, which can be viewed as a single data stream. At the sending and receiving ends of the optical network, it is necessary to separate these multiple data streams into single data streams or to combine different single data streams. [0003] A fixed-pitch Fabry-Perot interferometer, ...
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IPC IPC(8): G02B6/293
Inventor 顾共恩赵兰兰
Owner AOC TECH (WUHAN) CO LTD