| 1. |
- Foltynowicz, Aleksandra, 1981-, et al.
(författare)
-
Cavity-enhanced optical frequency combs spectroscopy in the near- and mid-infrared
- 2016
-
Ingår i: Imaging and applied optics 2016. - : OSA - The Optical Society. - 9781943580156
-
Konferensbidrag (refereegranskat)abstract
- We present the recent developments in high-resolution Fourier transform spectroscopy based on optical frequency combs for precision measurements and combustion diagnostics, and the first implementation of continuous-filtering Vernier spectroscopy in the mid-infrared wavelength range for fast multispecies detection.
|
|
| 2. |
- Johansson, Alexandra C., 1987-, et al.
(författare)
-
Fourier-transform-based noise-immune cavity-enhanced optical frequency comb spectroscopy
- 2016
-
Ingår i: Light, Energy and the Environment. - : Optica Publishing Group (formerly OSA). - 9781557528209
-
Konferensbidrag (refereegranskat)abstract
- We describe the principles and implementation of Fourier-transform-based cavityenhanced optical frequency comb spectroscopy that uses phase modulation at the cavity free spectral range frequency to achieve high sensitivity over broad spectral range.
|
|
| 3. |
- Khodabakhsh, Amir, et al.
(författare)
-
Fourier transform and Vernier spectroscopy using an optical frequency comb at 3-5.4 μm
- 2016
-
Ingår i: Optics Letters. - 0146-9592 .- 1539-4794. ; 41:11, s. 2541-2544
-
Tidskriftsartikel (refereegranskat)abstract
- We present a versatilemid-infrared frequency comb spectroscopy system based on a doubly resonant optical parametric oscillator tunable in the 3-5.4 mu m range and two detection methods: a Fourier transform spectrometer (FTS) and a continuous-filtering Vernier spectrometer (CF-VS). Using the FTS with a multipass cell, we measure high precision broadband absorption spectra of CH4 at 3.3 mu m and NO at 5.25 mu m, the latter for the first time with comb spectroscopy, and we detect atmospheric species (CH4, CO, CO2, and H2O) in air in the signal and idler ranges. Multiline fitting yields minimum detectable concentrations of 10-20 ppbHz-1/2 for CH4, NO, and CO. For the first time in the mid-infrared, we perform CF-VS using an enhancement cavity, a grating, and a single detector, and we measure the absorption spectrum of CH4 and H2O in ambient air at similar to 3.3 m mu, reaching a 40 ppb concentration detection limit for CH4 in 2 ms.
|
|
| 4. |
- Khodabakhsh, Amir, et al.
(författare)
-
Fourier transform and vernier spectroscopy with a mid-infrared optical frequency comb
- 2016
-
Ingår i: Light, energy and the environment. - : Optica Publishing Group (formerly OSA). - 9780960038046
-
Konferensbidrag (refereegranskat)abstract
- We present a versatile frequency comb spectroscopy system based on a doubly resonant optical parametric oscillator tunable between 3-5.4 μm and two detection methods: a Fourier transform spectrometer and a continuous-filtering Vernier spectrometer.
|
|
| 5. |
|
|
| 6. |
- Maslowski, Piotr, et al.
(författare)
-
Surpassing the path-limited resolution of Fourier-transform spectrometry with frequency combs
- 2016
-
Ingår i: Physical Review A. - 2469-9926. ; 93:2
-
Tidskriftsartikel (refereegranskat)abstract
- We overcome the resolution limit of Fourier-transform spectrometry and measure instrumental line-shape-free broadband molecular spectra with lines narrower than the optical path-limited resolution. We do this by using an optical frequency comb and precisely matching the maximum delay range of the spectrometer to the comb line spacing to measure the intensities of the individual comb lines. This method allows measurements of undistorted high-resolution spectra with acquisition time and interferometer length reduced by orders of magnitude and with frequency scale accuracy given by the comb.
|
|
| 7. |
- Rutkowski, Lucile, et al.
(författare)
-
Detection of OH in an atmospheric flame at 1.5 μm using optical frequency comb spectroscopy
- 2016
-
Ingår i: Photonics Letters of Poland. - : Photonics Society of Poland. - 2080-2242. ; 8:4, s. 110-112
-
Tidskriftsartikel (refereegranskat)abstract
- We report broadband detection of OH in a premixed CH4/air flat flame at atmospheric pressure using cavity-enhanced absorption spectroscopy based on an Er:fiber femtosecond laser and a Fourier transform spectrometer. By taking ratios of spectra measured at different heights above the burner we separate twenty OH transitions from the largely overlapping water background. We retrieve from fits to the OH lines the relative variation of OH concentration and flame temperature with a height above the burner and compare them with the 1D simulations of flame structure.
|
|
| 8. |
- Rutkowski, Lucile, et al.
(författare)
-
Measurement of H2O and OH in a Flame by Optical Frequency Comb Spectroscopy
- 2016
-
Ingår i: Proceedings Conference on Lasers and Electro-Optics. - Washington, D.C. : IEEE. - 9781943580118
-
Konferensbidrag (refereegranskat)abstract
- We measure broadband H2O and OH spectra in a flame using near-infrared cavity-enhanced Fourier transform optical frequency comb spectroscopy, we retrieve temperature and OH concentration, and compare water spectra to an improved line list.
|
|
| 9. |
|
|
