External cavity quantum cascade laser emitting from 12.3 to 13.2 
                
                  
                
                $$\upmu$$
                
                  
                    μ
                  
                
              m

Magne, Sylvain; Tomko, Ján; Matsuoka, Yohei; Peters, Sven; Kischkat, Jan; Semtsiv, M. P.; Masselink, W. T.

doi:10.1007/s00340-018-7017-7

Cited by 2 publications

(1 citation statement)

References 16 publications

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“…The AR coatings (Al 2 O 3 /Ge) we have mastered generate additional optical absorption in the above tuning range, so the tuning range will be further improved after improving the quality of AR films and changing the types of coatings, such as YbF 3 and ZnS. [21] 0 0.4 0.8…”

Section: Fabrication and Characterization Of The Devicesmentioning

confidence: 99%

Broad gain, continuous-wave operation of InP-based quantum cascade laser at λ ∼ 11.8 μm*

Wang-Huan¹,

Zhang²,

Feng³

et al. 2021

Chinese Phys. B

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In this paper, we demonstrate a broad gain, continuous-wave (CW) operation InP-based quantum cascade laser (QCL) emitting at 11.8 μm with a modified dual-upper-state (DAU) and diagonal transition active region design. A 3 mm cavity length, 16.5μm average ridge wide QCL with high-reflection (HR) coatings demonstrates a maximum peak power of 1.07W at 283 K and CW output power of 60mW at 293K. The device also shows a broad and dual-frequency lasing spectrum in pulsed mode and a maximum average power of 258.6mW at 283K. Moreover, the full width at half maximum(FWHM) of the electroluminescent spectrum measured at subthreshold current is 2.37μm, which indicates a broad gain spectrum of the materials. The tuning range of 1.38μm is obtained by a grating-coupled external cavity (EC) littrow configuration, which is beneficial for gas detection.

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Section: Fabrication and Characterization Of The Devicesmentioning

confidence: 99%

Broad gain, continuous-wave operation of InP-based quantum cascade laser at λ ∼ 11.8 μm*

Wang-Huan¹,

Zhang²,

Feng³

et al. 2021

Chinese Phys. B

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show abstract

Experimental-based comparison between off-axis integrated cavity output spectroscopy and multipass-assisted wavelength modulation spectroscopy at 77 µm

et al. 2019

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A mid-infrared trace gas detection system based on off-axis integrated cavity output spectroscopy (OA-ICOS) is demonstrated for accurate and sensitive detection of N 2 O in combination with a continuous wave external-cavity quantum cascade laser (EC-QCL) working around 7.7 µm. A 13-times improvement in signal-to-noise ratio is achieved using a re-injection mirror and a minimum detection limit of 70 ppbv in less than 10 s averaging time is achieved, which yields a noise-equivalent absorption sensitivity (NEAS) of 6×10 −9 cm −1 Hz −1/2 . For comparison, a compact multipass cell is deployed to measure the same absorption line of N 2 O using wavelength modulation spectroscopy with second harmonic detection (WMS-2f). An enhancement factor of 20 in comparison to direct absorption spectroscopy (DAS) is achieved, yielding a minimum detection limit of 15 ppbv in less than 10 s averaging and a NEAS of 1×10 −9 cm −1 Hz −1/2 . A comprehensive comparison between the two systems is carried out in terms of residual amplitude noise (RAM), linearity, long-term stability, detection limit, spectral fitting, reproducibility, and background variations. The proposed sensor based on OA-ICOS is potentially advantageous for trace gas sensing in outdoor applications and harsh environments due to its robustness and flexibility of alignment.

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External cavity quantum cascade laser emitting from 12.3 to 13.2 $$\upmu$$ μ m

Cited by 2 publications

References 16 publications

Broad gain, continuous-wave operation of InP-based quantum cascade laser at λ ∼ 11.8 μm*

Broad gain, continuous-wave operation of InP-based quantum cascade laser at λ ∼ 11.8 μm*

Experimental-based comparison between off-axis integrated cavity output spectroscopy and multipass-assisted wavelength modulation spectroscopy at 77 µm

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