An iodine-stabilized He-Ne laser and a short external-mirror laser operating in single-longitudinal mode were used to form a master-slave laser system at 633-nm wavelength. As compared to the beam from the master laser, the beam of the slave laser is frequency-modulation-free and has a higher power. Also, the slave laser oscillation frequency is offset-locked in iodine-stabilized He-Ne laser by using a fast phase lock loop (PLL) circuit. The fluctuations of the frequency offset between the master and the slave lasers were less than 5 parts in 10¹³ with a 100 s gate time (the relative standard Allan variance was determined measuring the beat frequency between the master laser and the slave laser for different gate times while the iodine- stabilized laser was locked to different lines from the group d, e, f, g). The system proved a fast response and allows for a frequency offset of up to 300 MHz.

Date Published: 29 June 2001
PDF: 6 pages
Proc. SPIE 4430, ROMOPTO 2000: Sixth Conference on Optics, (29 June 2001); doi: 10.1117/12.432813

Published in SPIE Proceedings Vol. 4430:
ROMOPTO 2000: Sixth Conference on Optics
Valentin I. Vlad, Editor(s)