Kilohertz linewidth from frequency-stabilized mid-infrared quantum cascade lasers

Journal Article · Wed Dec 15 04:00:00 EST 1999 · Optics Letters, 24(24):1844 - 1846

DOI:https://doi.org/10.1364/OL.24.001844· OSTI ID:915723

Williams, Richard M; Kelly, James F; Hartman, John S; Sharpe, Steven W; Taubman, Matthew; Hall, John L; Capasso, Federico; Gmachl, Claire; Sivco, Deborah L; Baillargeon, James N; Cho, Alfred Y

Frequency stabilization of mid-IR quantum cascade (QC) lasers to the kilohertz level has been accomplished by use of electronic servo techniques. With this active feedback, an 8.5-µm QC distributed-feedback laser is locked to the side of a rovibrational resonance of nitrous oxide (N2 O) at 1176.61cm -1 . A stabilized frequency-noise spectral density of 42Hz/√Hz has been measured at 100 kHz; the calculated laser linewidth is 12 kHz.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 915723
• Report Number(s): PNNL-SA-31468; NN2001000
• Journal Information: Optics Letters, 24(24):1844 - 1846, Journal Name: Optics Letters, 24(24):1844 - 1846
• Country of Publication: United States
• Language: English