Long-term maintenance of the carrier-envelope phase coherence of a femtosecond laser

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The long-term carrier-envelope phase (CEP) coherence of a femtosecond laser with same pulse-to-pulse CEP value, obtained using the direct locking method, is demonstrated by employing a quasi-common-path interferometer (QPI). For the evaluation of the CEP stability, the phase noise properties of a femtosecond laser with the CEP stabilized using a QPI are compared with those obtained using a Mach-Zehnder f-2f interferometer, for which the phase power spectral density and the Allan deviation were calculated from the beat signals of the interferometers. With the improved CEP stability, the long-term CEP coherent signal with an accumulated phase noise well below 1 radian can be maintained for more than 56 hours, i.e., the CEP coherence is preserved without a phase cycle slip for more than 1.6 x 10(13) pulses at a repetition rate of 80 MHz. The relative stability is also estimated to be approximately 1.4 x 10(-22) at a central wavelength of 790 nm. (C)2010 Optical Society of America
Publisher
OPTICAL SOC AMER
Issue Date
2010-12
Language
English
Article Type
Article
Keywords

DIRECT LOCKING METHOD; MODE-LOCKED LASERS; FREQUENCY; STABILIZATION; INTERFEROMETER; GENERATION; PULSES; JITTER; GHZ

Citation

OPTICS EXPRESS, v.18, no.25, pp.26365 - 26372

ISSN
1094-4087
DOI
10.1364/OE.18.026365
URI
http://hdl.handle.net/10203/99828
Appears in Collection
PH-Journal Papers(저널논문)
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