期刊
REVIEW OF SCIENTIFIC INSTRUMENTS
卷 86, 期 8, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4928163
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资金
- DARPA PULSE program
- National Institute of Standards and Technology (NIST)
We describe the design, fabrication, and performance of a self-referenced, optically coherent frequency comb. The system robustness is derived from a combination of an optics package based on polarization-maintaining fiber, saturable absorbers for mode-locking, high signal-to-noise ratio (SNR) detection of the control signals, and digital feedback control for frequency stabilization. The output is phase-coherent over a 1-2 mu m octave-spanning spectrum with a pulse repetition rate of similar to 200 MHz and a residual pulse-to-pulse timing jitter < 3 fs well within the requirements of most frequency-comb applications. Digital control enables phase coherent operation for over 90 h, critical for phase-sensitive applications such as timekeeping. We show that this phase-slip free operation follows the fundamental limit set by the SNR of the control signals. Performance metrics from three nearly identical combs are presented. This laptop-sized comb should enable a wide-range of applications beyond the laboratory.
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