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Front. Inform. Technol. Electron. Eng.  2010, Vol. 11 Issue (10): 793-797    DOI: 10.1631/jzus.C0910622
    
Design and analysis of a mode-hop-free tunable laser based on etched diffraction grating
Rui-xing Zeng*, Lei Wang, Jian-jun He
Center for Integrated Optoelectronics, State Key Lab of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China
Design and analysis of a mode-hop-free tunable laser based on etched diffraction grating
Rui-xing Zeng*, Lei Wang, Jian-jun He
Center for Integrated Optoelectronics, State Key Lab of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China
 全文: PDF 
摘要： 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.
关键词： Semiconductor laser;  Integrated optics;  Etched diffraction grating    
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.
Key words: Semiconductor laser    Integrated optics    Etched diffraction grating
收稿日期: 2009-10-17 出版日期: 2010-09-30
CLC:  TN929.11  
基金资助: Project  supported  by  the  National  Natural  Science  Foundation  of China (No. 60788403) and the Fundamental Research Funds for the
Central Universities of China
通讯作者: Rui-xing ZENG     E-mail: zengruixing@coer.zju.edu.cn
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引用本文:

Rui-xing Zeng, Lei Wang, Jian-jun He. Design and analysis of a mode-hop-free tunable laser based on etched diffraction grating. Front. Inform. Technol. Electron. Eng., 2010, 11(10): 793-797.

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http://www.zjujournals.com/xueshu/fitee/CN/10.1631/jzus.C0910622    或    http://www.zjujournals.com/xueshu/fitee/CN/Y2010/V11/I10/793

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