Results 271 to 280 of about 80,084 (309)

Noise in strong laser-atom interactions: Phase telegraph noise

Physical Review A, 1984
We discuss strong laser-atom interactions that are subjected to jump-type (random telegraph) random-phase noise. Physically, the jumps may arise from laser fluctuations, from collisions of various kinds, or from other external forces. Our discussion is carried out in two stages.
J. H. Eberly, K. Wódkiewicz, B. W. Shore   +2 more
openaire   +1 more source

Intensity noise of an injection-locked Ti:sapphire laser: analysis of the phase-noise-to-amplitude-noise conversion

Journal of the Optical Society of America B, 2006
We describe the characterize a compact ring Ti:sapphire laser injection locked to an extended-cavity semiconductor source. The laser system has a good spectral purity and allows for fast scans, keeping the injectionlocking condition. We analyze experimentally the amplitude noise properties of the free-running and injected laser and show good agreement ...
J. BELFI, I. GALLI, G. GIUSFREDI, MARIN, FRANCESCO   +3 more
openaire   +4 more sources

Phase Noise Reduction of a Laser Source by External Phase Compensation

2019 IEEE Research and Applications of Photonics in Defense Conference (RAPID), 2019
Based on direct phase noise compensation utilizing an external phase modulator, we reduce the laser spectral width from 450 kHz to 60 kHz and detect directly 5 G-symbol/s binary and quaternary phase shift keying signals without digital signal processing electronics.
Ha Trong Thuy, Yong-Yuk Won, Dongsun Seo
openaire   +1 more source

Phase noise in a laser with output coupling

IEEE Journal of Quantum Electronics, 1984
An improved method of calculating the linewidth of a laser oscillator due to phase noise is proposed. The fluctuation in the output amplitude that leads to the phase diffusion is calculated as the amplified thermal and the quantum noise which are delta-correlated in time. The saturated gain distribution along the cavity axis that is consistent with the
openaire   +1 more source

Phase noise issues in femtosecond lasers

SPIE Proceedings, 2001
This paper explores the affect of phase modulation (PM), amplitude modulation (AM), and thermal noise on the rf spectrum, phase jitter, timing jitter, and frequency stability of femtosecond lasers and other precision sources. Using these concepts we can suggest how some noise aspects of femtosecond pulsed lasers should scale.
openaire   +1 more source

The Effects of Laser Phase Noise on Laser Radar Performance

1992
Abstract : Laser phase noise is shown to degrade the sensitivity in target vibration measurements using a CW laser with an FM discriminator.
A. L. Kachelmyer, K. I. Schultz, R. H. Kingston, C. Freed, R. S. Eng   +4 more
openaire   +1 more source

Compensation of Laser Phase Noise in Coded Distributed Acoustic Sensing

28th International Conference on Optical Fiber Sensors, 2023
We demonstrate, for the first time to our knowledge, a technique for the com- pensation of phase noise effects in coded pulse compression DAS and compare its perfor- mance to systems using frequency-modulated pulse compression.
Piñeiro Ben, Enrique, Sagüés García, Mikel, Loayssa Lara, Alayn   +2 more
openaire   +2 more sources

Measuring the phase noise of Raman lasers with an atom-based method

Review of Scientific Instruments, 2021
Phase noise of Raman lasers is a major source of noise for a Raman-type cold atom interferometer, which is traditionally measured using the signal source analyzer. We report here an atom-based method to measure the phase noise performance between two Raman lasers.
Yaning Wang, Shuhua Yan, Dongyang Xu, Mei Hu, Qixue Li, Xu Zhang, Huankai Zhang, Mengjie Lv, Aiai Jia, Guochao Wang, Lingxiao Zhu, Jun Yang   +11 more
openaire   +2 more sources

Conversion of laser phase noise to amplitude noise in a resonant atomic vapor: The role of laser linewidth

Physical Review A, 1999
When laser light propagates through a resonant medium, the transmitted beam can exhibit excess intensity noise [amplitude modulation (AM)]. In a semiclassical description of the phenomenon, laser phase noise (PM) induces fluctuations in the medium's electric susceptibility, which in turn cause fluctuations in the transmitted intensity.
J. Camparo, J. Coffer
openaire   +2 more sources

Effect of laser and RF oscillator phase noises

2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535), 2004
The effect of phase noises from a laser and an oscillator on radio over fiber (RoF) systems is analyzed and discussed with a power spectral density (PSD) function. It is shown that the carrier to noise ratio (CNR) penalty is deeply related to the bandwidth of a electrical filter at a receiver and the phase noise from a radio frequency (RF) signal ...
null Tae-Sik Cho, null Changho Yun, null Kanghee Kim, null Kiseon Kim   +3 more
openaire   +1 more source