Narrow-linewidth adjustable external cavity laser based on silicon substrate

A laser and narrow linewidth technology, applied in the field of narrow linewidth adjustable external cavity lasers, can solve the problems of complex mechanical control structure of lasers, difficult to achieve tuning range, high process requirements, etc., and achieve suitable for popularization, low manufacturing cost, and easy integrated effect

Active Publication Date: 2016-02-10
WUHAN POST & TELECOMM RES INST CO LTD
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Problems solved by technology

(2) A MEMS (Micro-Electro-MechanicalSystem, Micro-Electro-Mechanical System) external cavity tunable laser with a line width of 15kHz. The mechanical control structure of the laser

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  • Narrow-linewidth adjustable external cavity laser based on silicon substrate
  • Narrow-linewidth adjustable external cavity laser based on silicon substrate
  • Narrow-linewidth adjustable external cavity laser based on silicon substrate

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Embodiment Construction

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0027] see figure 1 As shown, the silicon-based narrow linewidth tunable external cavity laser in the embodiment of the present invention includes a light source 101, a silicon-based optical coupler 102, an asymmetric Mach-Zehnder interferometer 104, and a silicon-based microring filter 107 , 3 MMIs (1×2 multimode interferometer): a first MMI 103 , a second MMI 105 and a third MMI 106 , and 2 grating couplers: a first grating coupler 108 and a second grating coupler 109 . The light source 101 may be an SOA chip or an LD (semiconductor laser) chip, and the silicon-based optical coupler 102 may be an end face coupler or a grating coupler.

[0028] see figure 1 As shown, the asymmetrical Mach-Zehnder interferometer 104 is provided with two asymmetrical (that is, the arm lengths are not equal) waveguides (arms), and the silicon-based microring f...

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Abstract

The invention discloses a narrow-linewidth adjustable external cavity laser based on a silicon substrate and relates to the field of integrated optics in optical communication. The narrow-linewidth adjustable external cavity laser based on the silicon substrate is characterized in that a light source is connected with a first MMI (man-machine interface) by virtue of a silicone substrate optical coupler; the first MMI is respectively connected with input terminals of two arms of an asymmetric Mach-Zehnder interferometer, and output terminals of the two arms are connected with a third MMI by virtue of a second MMI; the third MMI is respectively connected with input terminals of an add channel and a drop channel of a silicon substrate micro-ring filter; and output terminals of the add channel and the drop channel are respectively connected with a first grating coupler and a second grating coupler. Free spectral range of the silicon substrate micro-ring filter is 5-50nm, and the free spectral range of the asymmetric Mach-Zehnder interferometer is 1-4 times that of the silicon substrate micro-ring filter. The narrow-linewidth adjustable external cavity laser based on the silicon substrate has the advantages that tuning range of wide wavelength can be widened, so that laser light can obtain narrow linewidth; and the narrow-linewidth adjustable external cavity laser based on the silicon substrate is a miniaturized cavity laser and is low in manufacturing cost, easy to integrate and low in technological tolerance, thereby being applicable to popularization.

Description

technical field [0001] The invention relates to the field of integrated optics of optical communication, in particular to a silicon-based narrow line width adjustable external cavity laser. Background technique [0002] In recent years, the spectral efficiency in optical communication systems has been increasing, and the coherent optical transmission system is considered to be a very good solution to the increase in spectral efficiency. Narrow linewidth tunable lasers are very important components in coherent optical transmission systems. At present, the existing tunable lasers are generally: (1) Monolithically integrated tunable lasers such as SGDBR (Sampledgratingdistributedbraggreflector sampling grating distributed Bragg reflection), DFB (Distributed FeedBack, distributed feedback) arrays and Y waveguides, monolithically integrated lasers High-precision photolithography is required. (2) A MEMS (Micro-Electro-Mechanical System, Micro-Electro-Mechanical System) external-...

Claims

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Application Information

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IPC IPC(8): H01S5/14H01S5/06
Inventor 邱英肖希陈代高王磊李淼峰
Owner WUHAN POST & TELECOMM RES INST CO LTD
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