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

Wang-Huan,; Zhang, Jin-Chuan; Feng, Cheng; Gu, Zhiqi; Zhuo, Ning; Zhai, Shenqiang; Liu, Fengqi; Liu, Junqi; Liu, Shuman; Wang, Zhanguo

doi:10.1088/1674-1056/abf91a

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Cited by 7 publications

References 22 publications

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External cavity quantum cascade laser with bias assisted tuning

Niu,

Sun,

Cheng

et al. 2024

Opt Quant Electron

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External cavity quantum cascade laser with bias assisted tuning

Niu,

Sun,

Cheng

et al. 2024

Opt Quant Electron

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High-performance quantum cascade lasers at λ ∼ 9 µm grown by MOCVD

Sun

Yin

zhang³

et al. 2022

Opt. Express

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We demonstrate a high power InP-based quantum cascade laser (QCL) (λ ∼ 9 µm) with high characteristic temperature grown by metalorganic chemical vapor deposition (MOCVD) in this article. A 4-mm-long cavity length, 10.5-µm-wide ridge QCL with high-reflection (HR) coating demonstrates a maximum pulsed peak power of 1.55 W and continuous-wave (CW) output power of 1.02W at 293 K. The pulsed threshold current density of the device is as low as 1.52 kA/cm2. The active region adopted a dual-upper-state (DAU) and multiple-lower-state (MS) design and it shows a wide electroluminescence (EL) spectrum with 466 cm−1 wide full-width at half maximum (FWHM). In addition, the device performance is insensitive to the temperature change since the threshold-current characteristic temperature coefficient, T0, is as high as 228 K, and slope-efficiency characteristic temperature coefficient, T1, is as high as 680 K, over the heatsink-temperature range of 293 K to 353 K.

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High power, broad tuning quantum cascade laser at λ ∼ 8.9 µm

Niu,

Yang,

Huang

et al. 2023

Opt. Express

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Many molecules have broad fingerprint absorption spectra in mid-wave infrared range which requires broadly tunable lasers to cover the interested spectrum in one scan. We report a strain-balanced, InAlAs/InGaAs/InP quantum cascade laser structure based on diagonal transition active region with high output power and and wide tuning range at λ ∼ 8.9 µm. The maximum pulsed optical power and the wall-plug efficiency at room temperature are 4 W and 11.7%, respectively. Maximum continuous wave double-facet power is 1.2 W at 25 °C for a 4 mm by 9 µm laser mounted epi-side down on a diamond/copper composite submount. The maximum pulsed and continuous wave external-cavity tuning range are from 7.71 µm to 9.15 µm and from 8 µm to 8.9 µm, respectively. The continuous wave power of the external cavity mode exceeds 200 mW across the entire spectrum.

show abstract

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

Cited by 7 publications

References 22 publications

External cavity quantum cascade laser with bias assisted tuning

External cavity quantum cascade laser with bias assisted tuning

High-performance quantum cascade lasers at λ ∼ 9 µm grown by MOCVD

High power, broad tuning quantum cascade laser at λ ∼ 8.9 µm

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