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Kilohertz Linewidth From Frequency-Stabilized Mid-Infrared Quantum Cascade Lasers



R M. Williams, J F. Kelly, J S. Hartman, S W. Sharpe, M S. Taubman, J L. Hall, F Capasso, D L. Sivco, J N. Bailargeon, Yoshi Ohno


Frequency stabilization of mid-IR quantum cascade (AC) lasers to the kilohertz level has been accomplished by use of electronic servo techniques. With this acive feedback, an 8.5- m QC distributed-feedback laser is locked to the side of a rovibrational resonance of nitrous oxide (N2O) at 1176.61 cm-1. A stabilized frequency-noise spectral density of 42 Hz/√Hz has been measured at 100 kHz; the calculated laser linewidth is 12 kHz.
Optic Letters
No. 24


frequency stabilized, quantum cascade laser


Williams, R. , Kelly, J. , Hartman, J. , Sharpe, S. , Taubman, M. , Hall, J. , Capasso, F. , Sivco, D. , Bailargeon, J. and Ohno, Y. (1999), Kilohertz Linewidth From Frequency-Stabilized Mid-Infrared Quantum Cascade Lasers, Optic Letters (Accessed February 24, 2024)
Created November 30, 1999, Updated October 12, 2021