Grating-tuned external-cavity quantum-cascade semiconductor lasers

Luo, Guoping; Peng, Chuan; Le, H. Q.; Pei, Shin Shem; Hwang, W.-Y.; Ishaug, B.; Um, J.; Baillargeon, J. N.; Lin, C.-H.

doi:10.1063/1.1371524

Cited by 97 publications

(42 citation statements)

References 6 publications

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“…As first demonstrated in 2001 by Luo et al, an external cavity arranged in a Littrow configuration allows for convenient tuning of the QCL operating frequency [14]. The ECL is tuned by varying the diffraction grating as described by the grating equation for Littrow configuration: λ = 2dsin(α), where the wavelength (λ) favored by the grating is determined by the angle of incidence of the beam onto the grating (α), the grating groove spacing (d), and diffraction order, m (m=1 was used in this work).…”

Section: Introductionmentioning

confidence: 99%

Active Wavelength Control for External Cavity Quantum Cascade Laser

Tsai

Wysocki

2011

CLEO:2011 - Laser Applications to Photonic Applications

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We present an active wavelength control system for grating-based external cavity lasers that increases the accuracy of predicting the lasing wavelength based on the grating equation and significantly improves scan-to-scan wavelength/frequency repeatability. The ultimate 3σ precision of a frequency scan is determined by the scan-to-scan repeatability of 0.042 cm −1 . Since this control method can be applied to any external cavity laser with little to no modification, such a precision provides an excellent opportunity for spectroscopic applications that target molecular absorption lines at standard atmospheric conditions.

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Section: Introductionmentioning

confidence: 99%

Active Wavelength Control for External Cavity Quantum Cascade Laser

Tsai

Wysocki

2011

CLEO:2011 - Laser Applications to Photonic Applications

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“…The widest wavelength tunability, covering a substantial fraction of the QCL gain bandwidth, has been demonstrated for lasers in the external cavity configuration with a mechanical grating controlling a wavelength-dependent feedback [3]. This configuration has been in wide use with all types of gain media including solids, liquids and gases for over forty years.…”

Section: Introductionmentioning

confidence: 99%

“…Photonics 2016, 3,19 8 of 12 Figure 6 shows a measured tuning curve for the same laser in QCW mode (350 ns pulses and 50% duty cycle) as AOM frequency was changed from 41.7 MHz to 48.5 MHz (approximately 1/3 of the available frequency range). AOM input power was fixed at 35 W, which corresponded to approximately 90% diffraction efficiency and estimated 70% effective coupling efficiency of the external cavity.…”

Section: Quasi-continuous Wave Operationmentioning

confidence: 99%

Progress in Rapidly-Tunable External Cavity Quantum Cascade Lasers with a Frequency-Shifted Feedback

et al. 2016

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Abstract:The recent demonstration of external cavity quantum cascade lasers with optical feedback, controlled by an acousto-optic modulator, paves the way to ruggedized infrared laser systems with the capability of tuning the emission wavelength on a microsecond scale. Such systems are of great importance for various critical applications requiring ultra-rapid wavelength tuning, including combustion and explosion diagnostics and standoff detection. In this paper, recent research results on these devices are summarized and the advantages of the new configuration are analyzed in the context of practical applications.

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“…Grating-tuned external-cavity system with a QC laser has been reported in Ref. 85. An intra-band InGaAs/InAlAs QC structure grown by MBE and fabricated into 10-12-µm-wide ridge waveguide laser was employed.…”

Section: External Cavity Wavelength Tunable Semiconductor Lasers -A Rmentioning

confidence: 99%

External cavity wavelength tunable semiconductor lasers - a review

Mroziewicz

2008

Opto-Electronics Review

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External cavity tunable lasers have been around for many years and now constitute a large group of semiconductor lasers featuring very unique properties. The present review has been restricted to the systems based on the edge emitting diode lasers set-up in a hybrid configuration. The aim was to make the paper as concise as possible without sacrificing, however, most important details. We start with short description of the fundamentals essential for operation of the external cavity lasers to set the stage for explanation of their properties and some typical designs. Then, semiconductor optical amplifiers used in the external cavity lasers are highlighted more in detail as well as diffraction gratings and other types of wavelength-selective reflectors used to provide optical feedback in these lasers. This is followed by a survey of designs and properties of various external cavity lasers both with mobile bulk gratings and with fixed wavelength selective mirrors. The paper closes with description of some recent developments in the field to show prospects for further progress directed towards miniaturization and integration of the external cavity laser components used so far to set-up hybrid systems.

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Grating-tuned external-cavity quantum-cascade semiconductor lasers

Cited by 97 publications

References 6 publications

Active Wavelength Control for External Cavity Quantum Cascade Laser

Active Wavelength Control for External Cavity Quantum Cascade Laser

Progress in Rapidly-Tunable External Cavity Quantum Cascade Lasers with a Frequency-Shifted Feedback

External cavity wavelength tunable semiconductor lasers - a review

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