Performance of 10.6 um CO2 Doppler lidar at low-laser-frequency stability using a fixed hard target

1996 ◽  
Author(s):  
Vladimir S. Marinov ◽  
Dimitar V. Stoyanov ◽  
Vassily N. Naboko ◽  
Sergei V. Naboko
Keyword(s):  
Laser Frequency ◽  
Frequency Stability ◽  
Doppler Lidar

2-µm Doppler lidar transmitter with high frequency stability and low chirp

2000 ◽  
Vol 25 (17) ◽  
pp. 1228 ◽  
Author(s):  
V. Wulfmeyer ◽  
M. Randall ◽  
A. Brewer ◽  
R. M. Hardesty
Keyword(s):  
High Frequency ◽  
Frequency Stability ◽  
Doppler Lidar

LRI Instrument status talk

2020 ◽  
Author(s):  
Samuel Francis
Keyword(s):  
High Frequency ◽  
Laser Frequency ◽  
Frequency Stability ◽  
Current Status ◽  
Range Measurement ◽  
Best Estimate

<p>In this talk, the current status of the LRI instrument will be presented. Topics will include laser frequency stability since launch, current best estimate of the noises in the LRI range spectra, and a look at some high-frequency signals visible in the LRI range measurement.</p>

scholarly journals Efficient technique for measuring laser frequency stability

2009 ◽  
Vol 48 (2) ◽  
pp. 20701 ◽  
Author(s):  
A. Sargsyan ◽  
A. V. Papoyan ◽  
D. Sarkisyan ◽  
A. Weis
Keyword(s):  
Laser Frequency ◽  
Frequency Stability ◽  
Efficient Technique

Rb-saturated absorption profile-based enhancement of semiconductor laser frequency stability

2007 ◽  
Author(s):  
K. Nakano ◽  
S. Maehara ◽  
M. Yanagisawa ◽  
Y. Sekiya ◽  
T. Sato ◽  
...  
Keyword(s):  
Semiconductor Laser ◽  
Laser Frequency ◽  
Frequency Stability ◽  
Absorption Profile ◽  
Saturated Absorption

Measuring the frequency stability of a quantum cascade laser frequency comb

2016 ◽  
Author(s):  
Francesco Cappelli ◽  
Giulio Campo ◽  
Iacopo Galli ◽  
Giovanni Giusfredi ◽  
Saverio Bartalini ◽  
...  
Keyword(s):  
Quantum Cascade Laser ◽  
Frequency Comb ◽  
Laser Frequency ◽  
Frequency Stability ◽  
Quantum Cascade

Development of Frequency Difference Lock Based Brillouin Sensor

2013 ◽  
Vol 655-657 ◽  
pp. 905-908
Author(s):  
Dong Dong Liu ◽  
Sheng Peng Wan ◽  
Di Peng ◽  
Yi Zhu Zhao
Keyword(s):  
Electric Field ◽  
Optical Fiber ◽  
Brillouin Scattering ◽  
Laser Frequency ◽  
Frequency Stability ◽  
Frequency Difference ◽  
Heterodyne Detection ◽  
Optical Delay ◽  
Stimulated Brillouin ◽  
System Program

In the paper, we research frequency difference lock of two lasers. In the optical fiber Brillouin sensor, two beams of laser frequency stability around 11G to achieve stimulated Brillouin scattering or heterodyne detection. Currently, we mainly through the optical delay to implement the locking of the frequency difference in the Brillouin sense. through the electric field amplify circuit to improve lock accuracy and improve the system program.

scholarly journals Frequency stability of a wavelength meter and applications to laser frequency stabilization

2015 ◽  
Vol 54 (32) ◽  
pp. 9446 ◽  
Author(s):  
Khaldoun Saleh ◽  
Jacques Millo ◽  
Alexandre Didier ◽  
Yann Kersalé ◽  
Clément Lacroûte
Keyword(s):  
Laser Frequency ◽  
Frequency Stability ◽  
Frequency Stabilization ◽  
Laser Frequency Stabilization

scholarly journals ALADIN laser frequency stability and its impact on the Aeolus wind error

2021 ◽  
Author(s):  
Oliver Lux ◽  
Christian Lemmerz ◽  
Fabian Weiler ◽  
Thomas Kanitz ◽  
Denny Wernham ◽  
...  
Keyword(s):  
Uv Light ◽  
Pulse Length ◽  
Doppler Frequency ◽  
Laser Frequency ◽  
Frequency Stability ◽  
Global Scale ◽  
Wind Data ◽  
Frequency Noise ◽  
Small Contribution ◽  
Laser Transmitter

Abstract. The acquisition of atmospheric wind profiles on a global scale was realized by the launch of the Aeolus satellite, carrying the unique Atmospheric LAser Doppler INstrument (ALADIN), the first Doppler wind lidar in space. One major component of ALADIN is its high-power, ultraviolet (UV) laser transmitter which is based on an injection-seeded, frequency-tripled Nd:YAG laser and fulfills a set of demanding requirements in terms of pulse energy, pulse length, repetition rate as well as spatial and spectral beam properties. In particular, the frequency stability of the laser emission is an essential parameter which determines the performance of the lidar instrument, as the Doppler frequency shifts to be detected are on the order of 108 smaller than the frequency of the emitted UV light. This article reports the assessment of the ALADIN laser frequency stability and its influence on the quality of the Aeolus wind data. Excellent frequency stability with pulse-to-pulse variations of about 10 MHz (root mean square) is evident for over more than two years of operations in space despite the permanent occurrence of short periods with significantly enhanced frequency noise (> 30 MHz). The latter were found to coincide with specific rotation speeds of the satellite's reaction wheels, suggesting that the root cause are micro-vibrations that deteriorate the laser stability on time scales of a few tens of seconds. Analysis of the Aeolus wind error with respect to ECMWF model winds shows that the temporally degraded frequency stability of the ALADIN laser transmitter has only minor influence on the wind data quality on a global scale, which is primarily due to the small percentage of wind measurements for which the frequency fluctuations are considerably enhanced. Hence, although the Mie wind bias is increased by 0.3 m·s−1 at times when the frequency stability is worse than 20 MHz, the small contribution of 4 % from all wind results renders this effect insignificant (

Influence of Laser Frequency Stability on Distributed Brillouin Sensing System

2019 ◽  
Vol 56 (17) ◽  
pp. 170624
Author(s):  
朱金顶 Jinding Zhu ◽  
程凌浩 Linghao Chen ◽  
周黎明 Liming Zhou ◽  
刘伟民 Weimin Liu
Keyword(s):  
Laser Frequency ◽  
Frequency Stability ◽  
Sensing System
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