Share Email Print
cover

Proceedings Paper • Open Access

Quantum cascade lasers as metrological tools for space optics
Author(s): S. Bartalini; S. Borri; I. Galli; D. Mazzotti; P. Cancio Pastor; G. Giusfredi; P. De Natale

Paper Abstract

A distributed-feedback quantum-cascade laser working in the 4.3÷4.4 mm 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 fiber-amplified Nd:YAG laser. The implementation of a new spectroscopic technique, known as polarization spectroscopy, provides an improved signal for the locking loop, and will lead to a narrower laser emission and a drastic improvement in the frequency stability, that in principle is limited only by the stability of the optical frequency comb synthesizer (few parts in 1013). These results confirm quantum cascade lasers as reliable sources not only for high-sensitivity, but also for highprecision measurements, ranking them as optimal laser sources for space applications.

Paper Details

Date Published: 21 November 2017
PDF: 8 pages
Proc. SPIE 10566, International Conference on Space Optics — ICSO 2008, 105661P (21 November 2017); doi: 10.1117/12.2308288
Show Author Affiliations
S. Bartalini, Istituto Nazionale di Ottica Applicata (Italy)
European Lab. for Non-Linear Spectroscopy (Italy)
S. Borri, Istituto Nazionale di Ottica Applicata (Italy)
European Lab. for Non-Linear Spectroscopy (Italy)
I. Galli, European Lab. for Non-Linear Spectroscopy (Italy)
Univ. degli Studi di Firenze (Italy)
D. Mazzotti, Istituto Nazionale di Ottica Applicata (Italy)
European Lab. for Non-Linear Spectroscopy (Italy)
P. Cancio Pastor, Istituto Nazionale di Ottica Applicata (Italy)
European Lab. for Non-Linear Spectroscopy (Italy)
G. Giusfredi, Istituto Nazionale di Ottica Applicata (Italy)
European Lab. for Non-Linear Spectroscopy (Italy)
P. De Natale, Istituto Nazionale di Ottica Applicata (Italy)
European Lab. for Non-Linear Spectroscopy (Italy)


Published in SPIE Proceedings Vol. 10566:
International Conference on Space Optics — ICSO 2008
Josiane Costeraste; Errico Armandillo; Nikos Karafolas, Editor(s)

© SPIE. Terms of Use
Back to Top