Comb-assisted subkilohertz linewidth quantum cascade laser for high-precision mid-infrared spectroscopy

Journal Article · Mon Mar 25 00:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4799284· OSTI ID:22162806

Galli, I.; Cappelli, F.; Bartalini, S.; Mazzotti, D.; Giusfredi, G.; Cancio, P.; De Natale, P. ^[1]; Siciliani de Cumis, M. ^[1]; Borri, S. ^[2]; Montori, A. ^[3]; Akikusa, N. ^[4]; Yamanishi, M. ^[5]

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1. CNR-INO-Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze, FI (Italy)
2. CNR-IFN-Istituto di Fotonica e Nanotecnologie, Via Amendola 173, 70126 Bari, BA (Italy)
3. LENS-European Laboratory for Non-Linear Spectroscopy, Via Carrara 1, 50019 Sesto Fiorentino, FI (Italy)
4. Development Bureau Laser Device R and D Group, Hamamatsu Photonics KK, Shizuoka 434-8601 (Japan)
5. Central Research Laboratories, Hamamatsu Photonics KK, Shizuoka 434-8601 (Japan)

We report on the linewidth narrowing of a room-temperature mid-infrared quantum cascade laser by phase-locking to a difference-frequency-generated radiation referenced to an optical frequency comb synthesizer. A locking bandwidth of 250 kHz, with a residual rms phase-noise of 0.56 rad, has been achieved. The laser linewidth is narrowed by more than 2 orders of magnitude below 1 kHz, and its frequency is stabilized with an absolute traceability of 2 Multiplication-Sign 10{sup -12}. This source has allowed the measurement of the absolute frequency of a CO{sub 2} molecular transition with an uncertainty of about 1 kHz.

• OSTI ID: 22162806
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 12 Vol. 102; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ABSORPTION SPECTROSCOPY
CARBON DIOXIDE
CONVERSION
FREQUENCY MEASUREMENT
INFRARED SPECTRA
KHZ RANGE
LASER RADIATION
LASERS
LINE NARROWING
MODE LOCKING
STABILITY
TEMPERATURE RANGE 0273-0400 K