Abstract
Tunable double-mode external cavity (EC) quantum cascade lasers (QCLs) based on a dual-Littrow and a dual-Littman configuration are reported. An otherwise multi-mode emitted Fabry–Perot (FP) QCL with no anti-reflective facet coating is used as the gain chip. In the dual-Littrow setup, a widely course double-mode tuning range of 400 nm for the spectral range between 4450 and 4850 nm in pulsed operation is achieved by rotating the diffraction gratings, whereas in the dual-Littman configuration a course double-mode tuning range of 330 nm for the spectral range between 4460 and 4790 nm is reached by rotating the mirrors. In both cases, a fine continuous tuning range over 10 nm is reached by modulating the injection current in a few ms without moving any part. The linewidth and maximum optical power of the dual-Littrow setup are determined to be 0.08 cm−1 and 40 mW, whereas these values for the dual-Littman configuration are found to be 0.01 cm−1 and 35 mW, respectively. N2O is used as target molecule to evaluate the absorption features of the lasers. To the best of our knowledge, it is the first demonstration of such double-mode EC-QCLs.
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References
Bayrakli, I.: Breath analysis using external cavity diode lasers: a review. J. Biomed. Opt. 22, 040901 (2017)
Bayrakli, I.: External cavity quantum cascade lasers without anti-reflection coating with intracavity and extracavity acoustic-optic frequency shifter for fast standoff detection. Opt. Laser Technol. 148, 107747 (2022)
Curl, R.F., et al.: Quantum cascade lasers in chemical physics. Chem. Phys. Lett. 487, 1–18 (2010)
Faist, J., et al.: Quantum cascade laser. Science 264, 553–556 (1994)
Fiddler, M.N., et al.: Laser spectroscopy for atmospheric and environmental sensing. Sensors 9, 10447–10512 (2009)
Hoppe, M., et al.: Construction and characterization of external cavity diode lasers based on a microelectromechanical system device. IEEE J. Sel. Top. Quant. Electron. 25, 2700109 (2019)
Kruczek, T., et al.: InAs/AlSb widely tunable external cavity quantum cascade laser around 3.2 \(\mu\)m. Appl. Phys. Lett. 102, 011124 (2013)
Lyakh, A., et al.: External cavity quantum cascade lasers with ultra rapid acousto-optic tuning. Appl. Phys. Lett. 106, 141101 (2015)
Lyakh, A., et al.: Continuous wave operation of quantum cascade lasers with frequency-shifted feedback. AIP Adv. 6, 015312 (2016)
Maulini, R., et al.: Continuous-wave operation of a broadly tunable thermoelectrically cooled external cavity quantum-cascade laser. Opt. Lett. 30, 2584–2586 (2005)
Maulini, R., et al.: External cavity quantum-cascade laser tunable from 8.2 to 10.4 \(\mu\)m using a gain element with a heterogeneous cascade. Appl. Phys. Lett. 88, 201113 (2006)
Ravishankara, A.R., et al.: Nitrous oxide (N\(_2\)O): the dominant ozone-depleting substance emitted in the 21st century. Science 326, 123–125 (2009)
Schwaighofer, A., et al.: Quantum cascade lasers (QCLs) in biomedical spectroscopy. Chem. Soc. Rev. 46, 5903–5924 (2017)
Tan, S., et al.: Low-threshold, high SMSR tunable external cavity quantum cascade laser around 4.7 \(\mu\)m. Opt. Quant. Electron. 45, 1147–1155 (2013)
Zeninari, V., et al.: Widely-tunable quantum cascade-based sources for the development of optical gas sensors. Sensors 20, 6650 (2020)
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This study was supported by the Scientific and Technological Research Council of Turkey (TUBITAK, 119F161).
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Bayrakli, I. Double-mode external cavity quantum cascade lasers. Opt Quant Electron 54, 425 (2022). https://doi.org/10.1007/s11082-022-03825-2
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DOI: https://doi.org/10.1007/s11082-022-03825-2