Mid-infrared (λ≈7.4 μm) quantum cascade laser amplifier for high power single-mode emission and improved beam quality

Mariano Troccoli; Claire Gmachl; Federico Capasso; Deborah L. Sivco; Alfred Y. Cho

doi:10.1063/1.1479453

Mid-infrared (λ≈7.4 μm) quantum cascade laser amplifier for high power single-mode emission and improved beam quality

Mariano Troccoli, Claire Gmachl, Federico Capasso, Deborah L. Sivco, Alfred Y. Cho

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

43 Scopus citations

Abstract

A quantum cascade laser amplifier has been developed. It was used to obtain high power single-mode emission at λ≈7.4μm from a quantum cascade distributed feedback laser, together with enhanced beam quality. Laser and amplifier are directly coupled in a master oscillator power amplifier configuration. Peak optical powers of 0.5 W at 80 K have been obtained. Ninety percent of the total power is thereby emitted within a divergence of 20° in the lateral direction. The device showed single mode operation with a side mode suppression ratio of 30 dB in the temperature range from 10 to 280 K. This allowed tuning of the emission wavelength in the range from 7.36 to 7.46 μm. The estimated peak amplifier gain is 6.4 and 4.9 dB at 80 and 300 K, respectively, and the cavity losses are 12.5 and 22 cm^-1 at the corresponding temperatures.

Original language	English (US)
Pages (from-to)	4103-4105
Number of pages	3
Journal	Applied Physics Letters
Volume	80
Issue number	22
DOIs	https://doi.org/10.1063/1.1479453
State	Published - Jun 3 2002
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.1479453

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abstract = "A quantum cascade laser amplifier has been developed. It was used to obtain high power single-mode emission at λ≈7.4μm from a quantum cascade distributed feedback laser, together with enhanced beam quality. Laser and amplifier are directly coupled in a master oscillator power amplifier configuration. Peak optical powers of 0.5 W at 80 K have been obtained. Ninety percent of the total power is thereby emitted within a divergence of 20° in the lateral direction. The device showed single mode operation with a side mode suppression ratio of 30 dB in the temperature range from 10 to 280 K. This allowed tuning of the emission wavelength in the range from 7.36 to 7.46 μm. The estimated peak amplifier gain is 6.4 and 4.9 dB at 80 and 300 K, respectively, and the cavity losses are 12.5 and 22 cm-1 at the corresponding temperatures.",

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T1 - Mid-infrared (λ≈7.4 μm) quantum cascade laser amplifier for high power single-mode emission and improved beam quality

AU - Troccoli, Mariano

AU - Gmachl, Claire

AU - Capasso, Federico

AU - Sivco, Deborah L.

AU - Cho, Alfred Y.

PY - 2002/6/3

Y1 - 2002/6/3

N2 - A quantum cascade laser amplifier has been developed. It was used to obtain high power single-mode emission at λ≈7.4μm from a quantum cascade distributed feedback laser, together with enhanced beam quality. Laser and amplifier are directly coupled in a master oscillator power amplifier configuration. Peak optical powers of 0.5 W at 80 K have been obtained. Ninety percent of the total power is thereby emitted within a divergence of 20° in the lateral direction. The device showed single mode operation with a side mode suppression ratio of 30 dB in the temperature range from 10 to 280 K. This allowed tuning of the emission wavelength in the range from 7.36 to 7.46 μm. The estimated peak amplifier gain is 6.4 and 4.9 dB at 80 and 300 K, respectively, and the cavity losses are 12.5 and 22 cm-1 at the corresponding temperatures.

AB - A quantum cascade laser amplifier has been developed. It was used to obtain high power single-mode emission at λ≈7.4μm from a quantum cascade distributed feedback laser, together with enhanced beam quality. Laser and amplifier are directly coupled in a master oscillator power amplifier configuration. Peak optical powers of 0.5 W at 80 K have been obtained. Ninety percent of the total power is thereby emitted within a divergence of 20° in the lateral direction. The device showed single mode operation with a side mode suppression ratio of 30 dB in the temperature range from 10 to 280 K. This allowed tuning of the emission wavelength in the range from 7.36 to 7.46 μm. The estimated peak amplifier gain is 6.4 and 4.9 dB at 80 and 300 K, respectively, and the cavity losses are 12.5 and 22 cm-1 at the corresponding temperatures.

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Mid-infrared (λ≈7.4 μm) quantum cascade laser amplifier for high power single-mode emission and improved beam quality

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