Phase noise characterization of a QD-based diode laser frequency comb
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Issue Date
2017Author
Vedala, Govind
Al-Qadi, Mustafa
O'Sullivan, Maurice
Cartledge, John
Hui, Rongqing
Publisher
Optical Society of America
Type
Article
Article Version
Scholarly/refereed, publisher version
Rights
© 2017 Optical Society of America
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Show full item recordAbstract
We measure, simultaneously, the phases of a large set of comb lines from a passively mode locked, InAs/InP, quantum dot laser frequency comb (QDLFC) by comparing the lines to a stable comb reference using multi-heterodyne coherent detection. Simultaneity permits the separation of differential and common mode phase noise and a straightforward determination of the wavelength corresponding to the minimum width of the comb line. We find that the common mode and differential phases are uncorrelated, and measure for the first time for a QDLFC that the intrinsic differential-mode phase (IDMP) between adjacent subcarriers is substantially the same for all subcarrier pairs. The latter observation supports an interpretation of 4.4ps as the standard deviation of IDMP on a 200µs time interval for this laser.
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Citation
Vedala,G., (2017) Phase noise characterization of a QD-based diode laser frequency comb, Optics Express, 25: 14, 10.1364/OE.25.015890
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