Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Single-particle laser Doppler anemometry at 1.55 µm

Not Accessible

Your library or personal account may give you access

Abstract

We demonstrate the successful operation of a cw laser Doppler wind sensor at a wavelength of 1.55 µm. At longer ranges (>100 m) the signal conforms closely to complex Gaussian statistics, consistent with the incoherent addition of contributions from a large number of scattering aerosols. As the range is reduced, the probe volume rapidly diminishes and the signal statistics are dramatically modified. At the shortest ranges (<8 m) the signal becomes dominated by short bursts, each originating from a single particle within the measurement volume. These single-particle events can have a very high signal-to-noise ratio (SNR) because (1) the signal becomes concentrated within a small time window and (2) its bandwidth is much reduced compared with multiparticle detection. Examples of wind-signal statistics at different ranges and for a variety of atmospheric backscatter conditions are presented. Results show that single-particle-scattering events play a significant role even to ranges of ∼50 m, leading to results inconsistent with complex Gaussian statistics. The potential is assessed for a low-power laser Doppler wind sensor that exploits the SNR enhancement obtained with single-particle detection.

© 2001 Optical Society of America

Full Article  |  PDF Article
More Like This
Continuous-wave bistatic laser Doppler wind sensor

Michael Harris, Graham Constant, and Carol Ward
Appl. Opt. 40(9) 1501-1506 (2001)

All-fiber multifunction continuous-wave coherent laser radar at 1.55 µm for range, speed, vibration, and wind measurements

Christer J. Karlsson, Fredrik Å. A. Olsson, Dietmar Letalick, and Michael Harris
Appl. Opt. 39(21) 3716-3726 (2000)

All semiconductor laser Doppler anemometer at 1.55 µm

René Skov Hansen and Christian Pedersen
Opt. Express 16(22) 18288-18295 (2008)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (3)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (3)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved