High-resolution (Doppler-limited) spectroscopy using quantum-cascade distributed-feedback lasers

S. W. Sharpe; J. F. Kelly; J. S. Hartman; C. Gmachl; F. Capasso; D. L. Sivco; J. N. Baillargeon; A. Y. Cho

doi:10.1364/OL.23.001396

High-resolution (Doppler-limited) spectroscopy using quantum-cascade distributed-feedback lasers

S. W. Sharpe, J. F. Kelly, J. S. Hartman, C. Gmachl, F. Capasso, D. L. Sivco, J. N. Baillargeon, A. Y. Cho

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

113 Scopus citations

Abstract

Lasing characteristics were evaluated for distributed-feedback quantum-cascade (QC) lasers operating in a continuous mode at cryogenic temperatures. These tests were performed to determine the QC lasers' suitability for use in high-resolution spectroscopic applications, including Doppler-limited molecular absorption and pressure-limited lidar applications. By use of a rapid-scan technique, direct absorbance measurements of nitric oxide (NO) and ammonia (NH₃) were performed with several QC lasers, operating at either 5.2 or 8.5 μm. Results include time-averaged linewidths of better than 40 MHz and long-term laser frequency reproducibility, even after numerous temperature cycles, of 80 MHz or better. Tuning rates of 2.5 cm^-1 in 0.6 ms can be easily achieved. Noise-equivalent absorbance of 3 × 10^-6 was also obtained without optimizing the optical arrangement.

Original language	English (US)
Pages (from-to)	1396-1398
Number of pages	3
Journal	Optics Letters
Volume	23
Issue number	17
DOIs	https://doi.org/10.1364/OL.23.001396
State	Published - Sep 1 1998
Externally published	Yes

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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10.1364/OL.23.001396

Cite this

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title = "High-resolution (Doppler-limited) spectroscopy using quantum-cascade distributed-feedback lasers",

abstract = "Lasing characteristics were evaluated for distributed-feedback quantum-cascade (QC) lasers operating in a continuous mode at cryogenic temperatures. These tests were performed to determine the QC lasers' suitability for use in high-resolution spectroscopic applications, including Doppler-limited molecular absorption and pressure-limited lidar applications. By use of a rapid-scan technique, direct absorbance measurements of nitric oxide (NO) and ammonia (NH3) were performed with several QC lasers, operating at either 5.2 or 8.5 μm. Results include time-averaged linewidths of better than 40 MHz and long-term laser frequency reproducibility, even after numerous temperature cycles, of 80 MHz or better. Tuning rates of 2.5 cm-1 in 0.6 ms can be easily achieved. Noise-equivalent absorbance of 3 × 10-6 was also obtained without optimizing the optical arrangement.",

author = "Sharpe, {S. W.} and Kelly, {J. F.} and Hartman, {J. S.} and C. Gmachl and F. Capasso and Sivco, {D. L.} and Baillargeon, {J. N.} and Cho, {A. Y.}",

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T1 - High-resolution (Doppler-limited) spectroscopy using quantum-cascade distributed-feedback lasers

AU - Sharpe, S. W.

AU - Kelly, J. F.

AU - Hartman, J. S.

AU - Gmachl, C.

AU - Capasso, F.

AU - Sivco, D. L.

AU - Baillargeon, J. N.

AU - Cho, A. Y.

PY - 1998/9/1

Y1 - 1998/9/1

N2 - Lasing characteristics were evaluated for distributed-feedback quantum-cascade (QC) lasers operating in a continuous mode at cryogenic temperatures. These tests were performed to determine the QC lasers' suitability for use in high-resolution spectroscopic applications, including Doppler-limited molecular absorption and pressure-limited lidar applications. By use of a rapid-scan technique, direct absorbance measurements of nitric oxide (NO) and ammonia (NH3) were performed with several QC lasers, operating at either 5.2 or 8.5 μm. Results include time-averaged linewidths of better than 40 MHz and long-term laser frequency reproducibility, even after numerous temperature cycles, of 80 MHz or better. Tuning rates of 2.5 cm-1 in 0.6 ms can be easily achieved. Noise-equivalent absorbance of 3 × 10-6 was also obtained without optimizing the optical arrangement.

AB - Lasing characteristics were evaluated for distributed-feedback quantum-cascade (QC) lasers operating in a continuous mode at cryogenic temperatures. These tests were performed to determine the QC lasers' suitability for use in high-resolution spectroscopic applications, including Doppler-limited molecular absorption and pressure-limited lidar applications. By use of a rapid-scan technique, direct absorbance measurements of nitric oxide (NO) and ammonia (NH3) were performed with several QC lasers, operating at either 5.2 or 8.5 μm. Results include time-averaged linewidths of better than 40 MHz and long-term laser frequency reproducibility, even after numerous temperature cycles, of 80 MHz or better. Tuning rates of 2.5 cm-1 in 0.6 ms can be easily achieved. Noise-equivalent absorbance of 3 × 10-6 was also obtained without optimizing the optical arrangement.

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High-resolution (Doppler-limited) spectroscopy using quantum-cascade distributed-feedback lasers

Abstract

All Science Journal Classification (ASJC) codes

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