Results 251 to 260 of about 19,361 (300)

Combining module based on coherent polarization beam combining

Applied Optics, 2017
A multiaperture receiver with a phased array is an effective approach to overcome the effect of the random optical disturbance in coherent free-space laser communications, in which one of the key technologies is how to efficiently combine the multiple laser beams received by the phased array antenna.
Yan, Yang, Chao, Geng, Feng, Li, Xinyang, Li   +3 more
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Coherent Combining with Imperfect Beams

Advances in Optical Materials, 2011
Coherent combining efficiency losses from spatially and temporally mismatched input fields are quantified in terms of normalized variances of the field parameters. We derive expressions for Gaussian beams relevant for coherent fiber arrays.
Gregory D. Goodno, C. C. Shih, Joshua E. Rothenberg   +2 more
openaire   +1 more source

Analysis of multiwavelength coherent beam combining effect

Applied Optics, 2012
The combination effect of multiwavelength active coherent beam combination (CBC) is investigated theoretically. The dependence of the combination effect on the optical path control precision, spectral width, wavelength number, and channel number is revealed.
Han, Kai, Xu, Xiaojun, Liu, Zejin
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Active coherent beam combining of diode lasers

Optics Letters, 2011
We have demonstrated active coherent beam combination (CBC) of up to 218 semiconductor amplifiers with 38.5 W cw output using up to eleven one-dimensional 21-element individually addressable diode amplifier arrays operating at 960 nm. The amplifier array elements are slab-coupled-optical-waveguide semiconductor amplifiers (SCOWAs) set up in a master ...
Shawn M, Redmond, Kevin J, Creedon, Jan E, Kansky, Steven J, Augst, Leo J, Missaggia, Michael K, Connors, Robin K, Huang, Bien, Chann, Tso Yee, Fan, George W, Turner, Antonio, Sanchez-Rubio   +10 more
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Coherent beam combination in barium titanate

Journal of the Optical Society of America B, 1988
Coherent beam combination through multiple-beam self-pumped phase conjugation in BaTiO3 has been demonstrated to conjugate piston error to at least λ/10. The coupling is shown to occur by a copumping mechanism.
P. Fairchild, K. Davis, M. Valley
openaire   +1 more source

Binary coherent beam combination with mirror pairs

Applied Optics, 2002
A configuration of N coated mirrors or mirror pairs is described that has the potential to coherently combine 2N single-frequency phase-locked diffraction-limited polarized optical beams to form a single diffraction-limited beam. The application to beam combination of fiber amplifiers is discussed.
openaire   +2 more sources

Reinforcement Learning for Coherent Beam Combining

CLEO Pacific Rim Conference, 2018
Reinforcement learning has been shown to be capable of solving complex tasks. Here we show potential advantages and disadvantages in the context of phase control for coherent beam combining.
Henrik Tünnermann, Akira Shirakawa
openaire   +1 more source

A non-uniformly coherent combining beam

Laser Physics, 2014
An approach that can be used to generate more complex and interesting optical fields is proposed by controlling the phase, position, size and amplitude of each coherent array. To illustrate the advantages of the approach, the power coupling efficiency of the optical systems with Cassegrain-telescope receivers is studied.
Chunmei Chai, Chunnan Zhang, Lipeng Luo, Yongte Jiang, Haiqiang Tong, Xiuxiang Chu   +5 more
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Coherent Beam Combining of Fiber Lasers

CLEO Pacific Rim Conference, 2018
Coherent beam combination has been established as a performance scaling concept for laser systems to overcome limitations of a single emitter. Today, the most powerful femtosecond fiber lasers employ his technique.
Arno Klenke, Michael Müller, Henning Stark, Andreas Tünnermann, Jens Limpert   +4 more
openaire   +1 more source

Coherent beam combining of fiber amplifiers

2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666), 2005
In this paper, we demonstrate the coherent superposition of fiber amplifiers in a Michelson-type setup with active amplifying arms. The diffraction limited beam quality from the amplifiers is not reduced by imposing the beams and combining efficiencies exceeds 95%.
S. Hofer, H. Zellmer, J.-P. Raske, A. Tunnermann   +3 more
openaire   +1 more source