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Journal of Zhejiang University SCIENCE C 2010 Vol.11 No.10 P.793-797

http://doi.org/10.1631/jzus.C0910622


Design and analysis of a mode-hop-free tunable laser based on etched diffraction grating


Author(s):  Rui-xing Zeng, Lei Wang, Jian-jun He

Affiliation(s):  Center for Integrated Optoelectronics, State Key Lab of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   zengruixing@coer.zju.edu.cn

Key Words:  Semiconductor laser, Integrated optics, Etched diffraction grating


Rui-xing Zeng, Lei Wang, Jian-jun He. Design and analysis of a mode-hop-free tunable laser based on etched diffraction grating[J]. Journal of Zhejiang University Science C, 2010, 11(10): 793-797.

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author="Rui-xing Zeng, Lei Wang, Jian-jun He",
journal="Journal of Zhejiang University Science C",
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pages="793-797",
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publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.C0910622"
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%DOI 10.1631/jzus.C0910622

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A1 - Jian-jun He
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DOI - 10.1631/jzus.C0910622


Abstract: 
A novel semiconductor laser which can achieve mode-hop-free tuning is proposed. The device consists of an etched diffraction grating (EDG) as a dispersive element to provide the mode selection function and an active waveguide to provide optical gain for the laser. The slab waveguide region of the EDG contains a tuning section covered by an electrode to inject a tuning current, and thus changes the refractive index. Mode-hop-free tuning is achieved by specially designing the shape of the tuning section, so that the tuning rate of the central wavelength reflected by the EDG and the tuning rate of the resonant wavelength of the laser cavity are equal. An optimized tuning section shape is designed to obtain the largest tuning range within a limited current range. Numerical simulation is presented to demonstrate the mode-hop-free tuning operation.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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