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Optical waveguide element

A technology of optical waveguide and waveguide, which is applied in optical components, light guides, optics, etc., can solve the problems of improper bias state, inability to obtain the best output characteristics of the modulator, etc., and achieve the effect of stable output characteristics

Active Publication Date: 2012-11-21
SUMITOMO OSAKA CEMENT CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

In this way, for example, when the off-light component is used for the DC bias monitor control of the MZ type modulator, even if an appropriate bias point is set using the off-light (emission mode light), on the on-light output side It also becomes an inappropriate bias state, and there is a problem that the best output characteristics as a modulator cannot be obtained

Method used

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Embodiment Construction

[0029] The optical waveguide of the present invention will be described in detail below.

[0030] like image 3 As shown, the optical waveguide element of the present invention has a Mach-Zehnder type waveguide formed on the substrate, and is characterized in that the two waveguides (11 , 12) with an inclination angle of 0 degrees, the waveguide after the multiplexing section is multimode waveguide, the waveguide output from the multiplexing section is composed of 3 branch waveguides, and the 3 branch waveguides are composed of output main waveguide (14) and clip Two output sub-waveguides follow the output main waveguide.

[0031] like image 3 As shown, by arranging branch waveguides 11 and 12 in parallel, etc., setting the inclination angle of the two waveguides input to the multiplexer 13 to 0 degrees, and constituting the multiplexer with multimode waveguides, it is possible to suppress generation of Unnecessary higher order mode light. As a result, problems such as en...

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Abstract

The invention aims to provide an optical waveguide element which minimizes the excitation of an unnecessary higher mode in a multiplexing section of a MZ waveguide to increase the stabilization of output light, and is capable of efficiently deriving radiation mode light. Specifically disclosed is an optical waveguide element in which a Mach-Zehnder waveguide is formed on a substrate, wherein the inclination of two waveguides (11, 12) that are input to a multiplexing section (13) on the emission side of the Mach-Zehnder waveguide is a 0 degree; wherein the multiplexed waveguide of the multiplexing section is a multi-mode waveguide; and wherein a waveguide that is output from the multiplexing section is further configured from a three-branch waveguide consisting of an output main waveguide (14), and two output sub-waveguides (15, 16) that sandwich the output main waveguide (14) therebetween.

Description

technical field [0001] The present invention relates to an optical waveguide element, in particular to an optical waveguide element such as an optical modulator or an optical switch on which a Mach-Zehnder waveguide is formed on a substrate. Background technique [0002] In the field of optical communication and optical measurement, intensity modulators and optical switches having optical waveguides constituting a Mach-Zehnder type (MZ type) structure on substrates such as lithium niobate (LN) and semiconductor materials are widely used . [0003] The optical modulator of the MZ type structure has a modulation electrode arranged along the MZ type waveguide. By applying a voltage to the modulation voltage, the optical phase between the branch waveguides (arms) of the MZ type waveguide is changed. Interference phenomenon in the part, control light on / off (ON / OFF). [0004] As the MZ structure with the simplest multiplexer structure and the easiest manufacture, there is a cas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/122G02F1/035
CPCG02B6/29352G02B6/122G02B6/12007G02F2201/05G02F2201/06G02F2202/20G02B6/29355G02F2001/212G02F2001/217G02F1/212G02F1/217
Inventor 石川泰弘近藤胜利宫崎德一及川哲
Owner SUMITOMO OSAKA CEMENT CO LTD
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