Compact all-fiber pulsed coherent Doppler lidar system for wind sensing

Kameyama, Shumpei; Ando, Toshiyuki; Asaka, Kota; Hirano, Y.; Wadaka, Shusou

doi:10.1364/ao.46.001953

Cited by 134 publications

(64 citation statements)

References 21 publications

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“…Because of the all-fiber structure DOI: 10.1051/ adoption, the system is stable, reliable and high-integrated. The spread of optical fiber communication caused drop in prices and mass production [9]. The Fast Fourier Transform (FFT) spectral estimates are real time processed with FGP A.…”

Section: Methodsmentioning

confidence: 99%

Observations and Analysis of Turbulent Wake of Wind Turbine by Coherent Doppler Lidar

Yin

et al. 2016

EPJ Web of Conferences

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Turbulent wake of wind turbine will reduce the power output of wind farm. The access to real turbulent wake of wind turbine blades with different spatial and temporal scales is provided by the pulsed Coherent Doppler Lidar (CDL) which operates by transmitting a laser beam and detecting the radiation backscattered by atmospheric aerosol particles. In this paper, the authors discuss the possibility of using lidar measurements to characterize the complicated wind field, specifically wind velocity deficit by the turbine wake.

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Section: Methodsmentioning

confidence: 99%

Observations and Analysis of Turbulent Wake of Wind Turbine by Coherent Doppler Lidar

Yin

et al. 2016

EPJ Web of Conferences

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“…Over the past decade, single frequency pulsed fiber lasers are studied widely. All-fiber CDL system at 1.5 μ m has attracted much attentions because of its eye safety, compact size, flexible arrangement, and mature fiber components technology from telecommunication industry [9] . It is also suitable for airborne wind profile measurement because of its stable performance in harsh environment.…”

Section: Introductionmentioning

confidence: 99%

All-Fiber Airborne Coherent Doppler Lidar to Measure Wind Profiles

Liu

Zhu

Diao

et al. 2016

EPJ Web of Conferences

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An all-fiber airborne pulsed coherent Doppler lidar (CDL) prototype at 1.54μm is developed to measure wind profiles in the lower troposphere layer. The all-fiber single frequency pulsed laser is operated with pulse energy of 300μJ, pulse width of 400ns and pulse repetition rate of 10kHz. To the best of our knowledge, it is the highest pulse energy of all-fiber eye-safe single frequency laser that is used in airborne coherent wind lidar. The telescope optical diameter of monostatic lidar is 100 mm. Velocity-Azimuth-Display (VAD) scanning is implemented with 20 degrees elevation angle in 8 different azimuths. Real-time signal processing board is developed to acquire and process the heterodyne mixing signal with 10000 pulses spectra accumulated every second. Wind profiles are obtained every 20 seconds. Several experiments are implemented to evaluate the performance of the lidar. We have carried out airborne wind lidar experiments successfully, and the wind profiles are compared with aerological theodolite and ground based wind lidar. Wind speed standard error of less than 0.4m/s is shown between airborne wind lidar and balloon aerological theodolite.

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“…[1] Erbium doped fiber amplifiers (EDFA) are pumped with laser diodes to achieve the population inversion which is needed for amplification of the injected seed pulses. During the amplification of the seed pulses the population inversion decreases as the pump process is rather slow compared to the pulse duration.…”

Section: Introductionmentioning

confidence: 99%