论文信息 - Current and frequency modulation characteristics for continuous-wave quantum cascade lasers at 9.06 μm.

Current and frequency modulation characteristics for continuous-wave quantum cascade lasers at 9.06 μm.

We report the characteristics of current induced frequency modulation (FM) for two continuous-wave quantum cascade lasers (QCLs) at 9.06 μm. Both the frequency tuning rate and the phase shift between intensity modulation and FM are measured at different modulation frequencies from 10 Hz to 200 kHz. The frequency tuning rate of the QCLs depends on both the modulation frequency and amplitude. The tested QCL has been used to detect ambient water vapor with wavelength modulation spectroscopy for validation with a numerical model.

David J. Miller | M. A. Khan | K. Sun | L. Tao | M. Zondlo

[1] J. Faist,et al. Frequency noise of free-running 4.6 μm distributed feedback quantum cascade lasers near room temperature. , 2011, Optics letters.

[2] S. Borri,et al. Frequency-Noise Dynamics of Mid-Infrared Quantum Cascade Lasers , 2011, IEEE Journal of Quantum Electronics.

[3] F. Capasso,et al. Quantum cascade lasers in chemical physics , 2010 .

[4] Hejie Li,et al. Extension of wavelength-modulation spectroscopy to large modulation depth for diode laser absorption measurements in high-pressure gases. , 2006, Applied optics.

[5] Luc Thévenaz,et al. Experimental method based on wavelength-modulation spectroscopy for the characterization of semiconductor lasers under direct modulation. , 2004, Applied optics.

[6] Luc Thévenaz,et al. Wavelength modulation spectroscopy: combined frequency and intensity laser modulation. , 2003, Applied optics.

[7] S. Krupa. Effects of atmospheric ammonia (NH3) on terrestrial vegetation: a review. , 2003, Environmental pollution.

[8] F. Capasso,et al. Recent progress in quantum cascade lasers and applications , 2001 .