Grating-cavity continuous-wave optical parametric oscillators for high-resolution mid-infrared spectroscopy

Markku Vainio, Mikael Siltanen, Jari Peltola, Lauri Halonen (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

27 Citations (Scopus)

Abstract

The use of grating as a spectral filter provides a simple way of improving wavelength tuning and stability of continuous-wave optical parametric oscillators (cw OPOs). In this paper, we discuss how to design and use such grating-cavity cw OPOs for high-resolution spectroscopy in the molecular fingerprint region at ∼3μm. The first design presented in the paper is based on a metal-coated diffraction grating, which produces fast and broad wavelength tuning and high wavelength stability. The second design uses a bulk Bragg grating for high optical power and good spectral purity. We report a new Bragg-grating OPO and demonstrate its use in a Doppler-free absorption spectroscopy of CH4 at ∼3.22μm. In addition, we describe a new balanced detection scheme, which can be used to improve the signal-to-noise ratio of absorption measurements if the measurement noise is limited by the intensity noise of the mid-infrared OPO.
Original languageEnglish
Pages (from-to)A1-A10
JournalApplied Optics
Volume50
Issue number4
DOIs
Publication statusPublished - 2011
MoE publication typeA1 Journal article-refereed

Fingerprint

Optical parametric oscillators
parametric amplifiers
continuous radiation
Infrared spectroscopy
Bragg gratings
infrared spectroscopy
gratings
Wavelength
cavities
high resolution
Tuning
tuning
wavelengths
noise intensity
Diffraction gratings
noise measurement
gratings (spectra)
Absorption spectroscopy
Signal to noise ratio
absorption spectroscopy

Keywords

  • spectroscopy
  • oscillators

Cite this

Vainio, Markku ; Siltanen, Mikael ; Peltola, Jari ; Halonen, Lauri. / Grating-cavity continuous-wave optical parametric oscillators for high-resolution mid-infrared spectroscopy. In: Applied Optics. 2011 ; Vol. 50, No. 4. pp. A1-A10.
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Grating-cavity continuous-wave optical parametric oscillators for high-resolution mid-infrared spectroscopy. / Vainio, Markku; Siltanen, Mikael; Peltola, Jari; Halonen, Lauri (Corresponding Author).

In: Applied Optics, Vol. 50, No. 4, 2011, p. A1-A10.

Research output: Contribution to journalArticleScientificpeer-review

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N2 - The use of grating as a spectral filter provides a simple way of improving wavelength tuning and stability of continuous-wave optical parametric oscillators (cw OPOs). In this paper, we discuss how to design and use such grating-cavity cw OPOs for high-resolution spectroscopy in the molecular fingerprint region at ∼3μm. The first design presented in the paper is based on a metal-coated diffraction grating, which produces fast and broad wavelength tuning and high wavelength stability. The second design uses a bulk Bragg grating for high optical power and good spectral purity. We report a new Bragg-grating OPO and demonstrate its use in a Doppler-free absorption spectroscopy of CH4 at ∼3.22μm. In addition, we describe a new balanced detection scheme, which can be used to improve the signal-to-noise ratio of absorption measurements if the measurement noise is limited by the intensity noise of the mid-infrared OPO.

AB - The use of grating as a spectral filter provides a simple way of improving wavelength tuning and stability of continuous-wave optical parametric oscillators (cw OPOs). In this paper, we discuss how to design and use such grating-cavity cw OPOs for high-resolution spectroscopy in the molecular fingerprint region at ∼3μm. The first design presented in the paper is based on a metal-coated diffraction grating, which produces fast and broad wavelength tuning and high wavelength stability. The second design uses a bulk Bragg grating for high optical power and good spectral purity. We report a new Bragg-grating OPO and demonstrate its use in a Doppler-free absorption spectroscopy of CH4 at ∼3.22μm. In addition, we describe a new balanced detection scheme, which can be used to improve the signal-to-noise ratio of absorption measurements if the measurement noise is limited by the intensity noise of the mid-infrared OPO.

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