Title :
CPT pulse excitation method based on VCSEL current modulation for miniature atomic clocks
Author :
Ide, Takumi ; Goka, Shigeyoshi ; Yano, Yuichiro
Author_Institution :
Grad. Sch. of Sci. & Eng., Tokyo Metropolitan Univ., Hachioji, Japan
Abstract :
We propose a coherent population trapping (CPT) pulsed-excitation method based on direct drive-current modulation of a vertical-cavity surface-emitting LASER for miniature atomic clocks (MACs). Because our method needs only a simple device configuration without optical external modulators, it is suitable for MACs, including chip-scale atomic-clocks. Reducing the size, cost, and power consumption is also possible. Additionally, we report on experimental results for Ramsey-CPT fringes excited using the proposed method.
Keywords :
atomic clocks; laser cavity resonators; optical modulation; optical saturable absorption; power consumption; surface emitting lasers; CPT pulse excitation method; Ramsey-CPT fringes; VCSEL current modulation; chip-scale atomic-clocks; coherent population trapping; cost reduction; direct drive-current modulation; miniature atomic clocks; power consumption; size reduction; vertical-cavity surface-emitting laser; Atomic clocks; Laser beams; Laser excitation; Laser stability; Modulation; Sociology; Vertical cavity surface emitting lasers; chip-scale atomic-clocks (CSACs); coherent population trapping (CPT); minuature atomic clocks (MACs); pulsed excitation;
Conference_Titel :
Frequency Control Symposium & the European Frequency and Time Forum (FCS), 2015 Joint Conference of the IEEE International
Conference_Location :
Denver, CO
Print_ISBN :
978-1-4799-8865-5
DOI :
10.1109/FCS.2015.7138815
