Evaluation of laser frequency offset locking using an electrical delay line

Frequency offset locking between two Nd:YAG lasers is performed using frequency locking with an electrical delay line. The relative frequency instability of the offset locking is measured to be 3.5×10 for an averaging time of 1 s, which is approximately 77 times smaller than that of the free-running...

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Bibliographic Details
Published in:Applied optics (2004) 2018-07, Vol.57 (20), p.5628
Main Authors: Hisai, Yusuke, Ikeda, Kohei, Sakagami, Haruki, Horikiri, Tomoyuki, Kobayashi, Takumi, Yoshii, Kazumichi, Hong, Feng-Lei
Format: Article
Language:English
Subjects:
Delay
Frequency locking
Frequency stability
Laser cooling
Lasers
Locking
Optical frequency
Quantum optics
Semiconductor lasers
Solid state lasers
YAG lasers
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Summary:Frequency offset locking between two Nd:YAG lasers is performed using frequency locking with an electrical delay line. The relative frequency instability of the offset locking is measured to be 3.5×10 for an averaging time of 1 s, which is approximately 77 times smaller than that of the free-running case. The frequency instability of the frequency locking is compared to that of the phase locking between the two Nd:YAG lasers. Furthermore, a compact solid-state laser is frequency locked to an optical frequency comb with a frequency instability of 8.2×10 for an averaging time of 1 s, which is improved by approximately 20 times, with respect to the free-running case. The offset-locking scheme using a delay line is useful for various applications including a research on quantum optics, interferometric measurements, and experiments involving laser cooling, such as an optical lattice clock.
ISSN:1559-128X
2155-3165
DOI:10.1364/ao.57.005628