Abstract
In the presence of pulsed laser excitations, a Fabry-Perot cavity produces an optical signal transmission which decays out exponentially with a time rate proportional to the cavity loss. The signal is thus referred to as a ring-down signal and its feature provides a simple physical background for cavity ring-down spectroscopy (CRDS) to measure the ultralow absorption of a sample contained in the cavity. Numerical calculations are performed on temporal profile, intensity modulation behavior, and output coupling efficiency of the ring-down signal. The assumption made for the investigation is that a Fourier-transform-limited Gaussian laser pulse be injected to a stable empty cavity with complete mode-match to the lowest cavity transverse mode. It is found that the ring-down signal is generally superimposed by an inherent intensity modulation and a transient peak. The behavior dramatically changes depending on the excitation pulse duration and the cavity parameters such as the cavity free-spectral-range and the frequency detuning. Intuitive and straight forward time domain pictures are provided to allow understanding of the features in the context of time domain interference characterized by the amount of temporal overlap and the phase shift between the interfering fields. Also predicted is the superluminal transmission in a Fabry-Perot cavity which is confirmed by both the numerical calculation of the transmitted pulse profile in time domain and theoretical analysis based on the frequency domain description.
| Original language | English |
|---|---|
| Title of host publication | CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 348-349 |
| Number of pages | 2 |
| Volume | 2 |
| ISBN (Electronic) | 0780356616, 9780780356610 |
| DOIs | |
| Publication status | Published - 1999 Jan 1 |
| Event | 1999 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim 1999 - Seoul, Korea, Republic of Duration: 1999 Aug 30 → 1999 Sep 3 |
Other
| Other | 1999 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim 1999 |
|---|---|
| Country | Korea, Republic of |
| City | Seoul |
| Period | 99/8/30 → 99/9/3 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Computer Networks and Communications
- Physics and Astronomy(all)
Cite this
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Numerical investigation on the cavity ring-down signal produced by a pulsed laser excitation of a Fabry-Perot cavity. / Lee, Jae Yong; Lee, Hai Woon; Hahn, Jae Won.
CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics. Vol. 2 Institute of Electrical and Electronics Engineers Inc., 1999. p. 348-349 811462.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - Numerical investigation on the cavity ring-down signal produced by a pulsed laser excitation of a Fabry-Perot cavity
AU - Lee, Jae Yong
AU - Lee, Hai Woon
AU - Hahn, Jae Won
PY - 1999/1/1
Y1 - 1999/1/1
N2 - In the presence of pulsed laser excitations, a Fabry-Perot cavity produces an optical signal transmission which decays out exponentially with a time rate proportional to the cavity loss. The signal is thus referred to as a ring-down signal and its feature provides a simple physical background for cavity ring-down spectroscopy (CRDS) to measure the ultralow absorption of a sample contained in the cavity. Numerical calculations are performed on temporal profile, intensity modulation behavior, and output coupling efficiency of the ring-down signal. The assumption made for the investigation is that a Fourier-transform-limited Gaussian laser pulse be injected to a stable empty cavity with complete mode-match to the lowest cavity transverse mode. It is found that the ring-down signal is generally superimposed by an inherent intensity modulation and a transient peak. The behavior dramatically changes depending on the excitation pulse duration and the cavity parameters such as the cavity free-spectral-range and the frequency detuning. Intuitive and straight forward time domain pictures are provided to allow understanding of the features in the context of time domain interference characterized by the amount of temporal overlap and the phase shift between the interfering fields. Also predicted is the superluminal transmission in a Fabry-Perot cavity which is confirmed by both the numerical calculation of the transmitted pulse profile in time domain and theoretical analysis based on the frequency domain description.
AB - In the presence of pulsed laser excitations, a Fabry-Perot cavity produces an optical signal transmission which decays out exponentially with a time rate proportional to the cavity loss. The signal is thus referred to as a ring-down signal and its feature provides a simple physical background for cavity ring-down spectroscopy (CRDS) to measure the ultralow absorption of a sample contained in the cavity. Numerical calculations are performed on temporal profile, intensity modulation behavior, and output coupling efficiency of the ring-down signal. The assumption made for the investigation is that a Fourier-transform-limited Gaussian laser pulse be injected to a stable empty cavity with complete mode-match to the lowest cavity transverse mode. It is found that the ring-down signal is generally superimposed by an inherent intensity modulation and a transient peak. The behavior dramatically changes depending on the excitation pulse duration and the cavity parameters such as the cavity free-spectral-range and the frequency detuning. Intuitive and straight forward time domain pictures are provided to allow understanding of the features in the context of time domain interference characterized by the amount of temporal overlap and the phase shift between the interfering fields. Also predicted is the superluminal transmission in a Fabry-Perot cavity which is confirmed by both the numerical calculation of the transmitted pulse profile in time domain and theoretical analysis based on the frequency domain description.
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U2 - 10.1109/CLEOPR.1999.811462
DO - 10.1109/CLEOPR.1999.811462
M3 - Conference contribution
VL - 2
SP - 348
EP - 349
BT - CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics
PB - Institute of Electrical and Electronics Engineers Inc.
ER -