International Conference on Space Optics — ICSO 2008 2017
DOI: 10.1117/12.2308288
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Quantum cascade lasers as metrological tools for space optics

Abstract: A distributed-feedback quantum-cascade laser working in the 4.3÷4.4 µm range has been frequency stabilized to the Lamb-dip center of a CO2 ro-vibrational transition by means of first-derivative locking to the saturated absorption signal, and its absolute frequency counted with a kHz-level precision and an overall uncertainty of 75 kHz. This has been made possible by an optical link between the QCL and a near-IR Optical Frequency Comb Synthesizer, thanks to a non-linear sum-frequency generation process with a f… Show more

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