The intrinsic frequency fluctuations of two single-mode quantum cascade distributed feedback (QC-DFB) lasers operating continuously at a wavelength of 8.5 mm are reported. A Doppler-limited ro-vibrational resonance of nitrous oxide is used to transform the frequency noise into measurable intensity fluctuations. The QC lasers, along with recently improved current controllers, exhibit a free-running frequency stability of 150 kHz over a 15 ms time interval.
Revised: December 17, 2002 |
Published: February 1, 2002
Citation
Myers T.L., R.M. Williams, M.S. Taubman, C. Gmachl, F. Capasso, D.L. Sivco, and J.N. Baillargeon, et al. 2002.Free-Running Frequency Stability of Mid-Infrared Quantum Cascade Lasers.Optics Letters 27, no. 3:170-172. PNWD-SA-5478.