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Title
Japanese:MEMS Tunable 795 nm VCSEL for Chip Scale Atomic Clock 
English:MEMS Tunable 795 nm VCSEL for Chip Scale Atomic Clock 
Author
Japanese: Islam Mohammad Shafiqul, Khan Mohammed Saad, 大礒義孝, Isamoto Keiji, Hiroshi Toshiyoshi, 西山伸彦.  
English: Islam Mohammad Shafiqul, Mohammed Saad Khan, Yoshitaka Oiso, Keiji Isamoto, Hiroshi Toshiyoshi, Nobuhiko Nishiyama.  
Language English 
Journal/Book name
Japanese: 
English: 
Volume, Number, Page 8p-N206-4       
Published date July 2, 2025 
Publisher
Japanese: 
English: 
Conference name
Japanese:2025年第86回応用物理学会秋季学術講演会 
English:The 86th JSAP Autumn Meeting 2025 
Conference site
Japanese: 
English:Tempaku Campus,Meijo University 
Official URL https://pub.confit.atlas.jp/ja/event/jsap2025a/presentation/8p-N206-4
 
Abstract Compact laser sources have become an indispensable and ideal component to incorporate a coherent population tapping (CPT) based chip scale atomic clock (CSAC). The implementation of CPT resonance is effective to generate a signal as a frequency reference, as the emission wavelength of the laser should be same as the characteristic absorption wavelength of alkali atoms. Vertical Cavity Surface Emitting Laser (VCSEL) is used mostly in the atomic clock for CPT excitation as an optical source due to various advantages such as reliability, cost effectiveness, and wide tunability. In this work, we established a 795 nm wavelength range tunable VCSEL utilizing micro electro-mechanical system (MEMS) as a movable reflector, which confirmed the emission wavelength at 795 nm and wavelength tuning range of 35 nm. The results indicate that 795 nm VCSEL is suitable for Rb transition and CPT resonance effect in CSAC applications.

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