Room-temperature continuous wave operation of distributed feedback quantum cascade lasers with watt-level power output

Q. Y. Lu; Y. Bai; N. Bandyopadhyay; S. Slivken; M. Razeghi

doi:10.1063/1.3525859

Room-temperature continuous wave operation of distributed feedback quantum cascade lasers with watt-level power output

Q. Y. Lu, Y. Bai, N. Bandyopadhyay, S. Slivken, M. Razeghi

Research output: Contribution to journal › Article › peer-review

49 Scopus citations

Abstract

We demonstrate surface-grating distributed feedback quantum cascade lasers (QCLs) with a watt-level power output at 4.75 μm. A device with a 5 mm cavity length exhibits an output power of 1.1 W in room-temperature cw operation. Single-mode operation with a side mode suppression ratio of 30 dB is obtained in the working temperature of 15-105 °C. A double-lobed far field with negligible beam steering is observed. The significance of this demonstration lies in its simplicity and readiness to be applied to standard QCL wafers with the promise of high-power performances.

Original language	English (US)
Article number	231119
Journal	Applied Physics Letters
Volume	97
Issue number	23
DOIs	https://doi.org/10.1063/1.3525859
State	Published - Dec 6 2010

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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abstract = "We demonstrate surface-grating distributed feedback quantum cascade lasers (QCLs) with a watt-level power output at 4.75 μm. A device with a 5 mm cavity length exhibits an output power of 1.1 W in room-temperature cw operation. Single-mode operation with a side mode suppression ratio of 30 dB is obtained in the working temperature of 15-105 °C. A double-lobed far field with negligible beam steering is observed. The significance of this demonstration lies in its simplicity and readiness to be applied to standard QCL wafers with the promise of high-power performances.",

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AU - Slivken, S.

AU - Razeghi, M.

PY - 2010/12/6

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N2 - We demonstrate surface-grating distributed feedback quantum cascade lasers (QCLs) with a watt-level power output at 4.75 μm. A device with a 5 mm cavity length exhibits an output power of 1.1 W in room-temperature cw operation. Single-mode operation with a side mode suppression ratio of 30 dB is obtained in the working temperature of 15-105 °C. A double-lobed far field with negligible beam steering is observed. The significance of this demonstration lies in its simplicity and readiness to be applied to standard QCL wafers with the promise of high-power performances.

AB - We demonstrate surface-grating distributed feedback quantum cascade lasers (QCLs) with a watt-level power output at 4.75 μm. A device with a 5 mm cavity length exhibits an output power of 1.1 W in room-temperature cw operation. Single-mode operation with a side mode suppression ratio of 30 dB is obtained in the working temperature of 15-105 °C. A double-lobed far field with negligible beam steering is observed. The significance of this demonstration lies in its simplicity and readiness to be applied to standard QCL wafers with the promise of high-power performances.

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Room-temperature continuous wave operation of distributed feedback quantum cascade lasers with watt-level power output

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