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Microcavity for chromatic dispersion cutting for silicon substrate multi-wavelength light source

A multi-wavelength light source and microcavity technology, applied in the field of lasers, can solve problems such as pump energy waste and achieve the effect of improving pump efficiency

Inactive Publication Date: 2015-10-14
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, in actual communication systems, such a broadband optical comb range is usually not used, so the existence of optical frequency comb modes outside the channel range will cause waste of pump energy

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  • Microcavity for chromatic dispersion cutting for silicon substrate multi-wavelength light source
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  • Microcavity for chromatic dispersion cutting for silicon substrate multi-wavelength light source

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Embodiment Construction

[0023] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0024] The technical problem to be solved by the present invention is to propose a new silicon-based microring with a hybrid structure, which has special dispersion tailoring characteristics. The realization of this dispersion characteristic can improve the pumping efficiency of the optical frequency comb generated by the Necker effect of the waveguide in the target optical communication band (1530nm~1565nm). The present invention proposes a micro ring cavity whose structure is mainly composed of a mixture of a photonic crystal waveguide (PCW) and an ordinary strip waveguide, and provides pum...

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Abstract

The invention provides a microcavity for chromatic dispersion cutting for silicon substrate multi-wavelength light source. The microcavity is in an annular structure and comprises a bar-shaped wave guide and a 2d panel photonic wave guide connected with the bar-shaped wave guide. Pump light with the wave length within a targeted wave band forms Kerr optical frequency comb when passing through the microcavity, so pumping efficiency of the optical frequency comb in the targeted wave band is improved. In the invention, within the targeted wave band, chromatic dispersion of the two wave guide structures can compensate each other, so the chromatic dispersion of the targeted wave band is flat on the whole and close to zero, thereby meeting a cascade connection four-wav mixing generation condition; wave bands of two sides of the targeted wave band still possesses great chromatic dispersion and cannot produce higher four-wave frequency, so the optical frequency comb is limited in the targeted wave band; and pumping efficiency of the microcavity in the targeted wave band can be improved.

Description

Technical field [0001] The present invention belongs to the field of lasers, and more specifically, relates to a microcavity for realizing dispersion tailoring of a silicon-based multi-wavelength light source. Background technique [0002] With the exponential growth of global information exchange, the requirements for high-speed and large-capacity communication systems are getting higher and higher. Optical interconnection technology is the most potential way to overcome the bottleneck of communication network transmission. Through the combined use of multiple wavelength division multiplexing (WDM) channels and multiple modulation formats, data transmission of tens of Tbit / s will be possible. At present, an integrated Tbit / s optical detection unit has been proposed, and the increase in optical signal transmission rate is mainly limited by the light source. Especially when some modulation formats that modulate both amplitude and phase are used, the phase noise and amplitude nois...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/35G02B6/122
CPCG02F1/3536G02B6/1225G02F2203/56
Inventor 张敏明卢鲁璐子李梅凤周飞亚刘德明
Owner HUAZHONG UNIV OF SCI & TECH