2ARC Centre of Excellence for Engineered Quantum Systems (EQUS), Research School of Physics, The Australian National University, Canberra ACT 260, Australia

Beam steeringantenna

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Laserbeam steering

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Unlike standard waveplates, Achromatic Waveplates, AWP, provide a constant phase shift independent of the wavelength of light that is used.This wavelength independence is achieved by using two different crystalline materials to yield quarter- or half-wave retardation over a broad spectral range.The Retardation tolerance of our AWPs is better than λ/100 over the entire wavelength range.The flat response of an AWP is ideal for use with tunable lasers,multiple laser-line systems and other broad spectrum sources.

Steering Beamof a car

Optical phased arrays (OPAs) are devices that use the coherence of light to control the interference pattern in the far field, which enables them to steer a laser beam with no moving parts. As such, OPAs have potential applications in laser communications, target acquisition and tracking, metrology, and directed energy. In this Letter, we present a control architecture for an actively phase-locked OPA, capable of steering a laser beam at speeds limited by the actuation bandwidth of electro-optic modulators. The system achieved an output phase stability of $\lambda /770$ and steering speeds up to 1 MHz. The digital control architecture can be extended to GHz steering speeds, is readily scalable to hundreds of emitters, and is compatible with high-power arrays.

David R. Gozzard, James T. Spollard, Paul G. Sibley, Lyle E. Roberts, and Daniel A. Shaddock OSA Continuum 3(12) 3399-3406 (2020)

Beam steeringultrasound

Jiangwei Wu, Zhaokang Liang, Xueyi Wang, Zhiwei Wei, Hao Li, Yuping Chen, and Xianfeng Chen Opt. Lett. 49(18) 5087-5090 (2024)

Beam steeringphased array

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Opticalbeam steering

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Unlike standard waveplates, Achromatic Waveplates, AWP, provide a constant phase shift independent of the wavelength of light that is used.This wavelength independence is achieved by using two different crystalline materials to yield quarter- or half-wave retardation over a broad spectral range.The Retardation tolerance of our AWPs is better than λ/100 over the entire wavelength range.The flat response of an AWP is ideal for use with tunable lasers,multiple laser-line systems and other broad spectrum sources.

Beam steeringtechniques

Beam steeringvs beamforming

Specifications: Wavelength Ranges:450～680nm,700～1000nm,950～1300nm,1200～1650nm Quarter Waveplates P/N # Half Waveplates Mounter Clear Thickness P/N # Diameter (mm) Aperture (mm) (mm) AWP 210Q AWP 210H 25.4 10 8 AWP 212Q AWP 212H 25.4 12.7 8 AWP 215Q AWP 215H 25.4 15 8 AWP 220Q AWP 220H 30 20 8 AWP 225Q AWP 225H 30 23.5 8 Achromatic Waveplate Curves

Optical phased arrays (OPAs) are devices that use the coherence of light to control the interference pattern in the far field, which enables them to steer a laser beam with no moving parts. As such, OPAs have potential applications in laser communications, target acquisition and tracking, metrology, and directed energy. In this Letter, we present a control architecture for an actively phase-locked OPA, capable of steering a laser beam at speeds limited by the actuation bandwidth of electro-optic modulators. The system achieved an output phase stability of $\lambda /770$ and steering speeds up to 1 MHz. The digital control architecture can be extended to GHz steering speeds, is readily scalable to hundreds of emitters, and is compatible with high-power arrays.

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1Centre for Gravitational Astrophysics, Research School of Physics, The Australian National University, Canberra ACT 260, Australia

Jason Midkiff, Kyoung Min Yoo, Jong-Dug Shin, Hamed Dalir, Mohammad Teimourpour, and Ray T. Chen Optica 7(11) 1544-1547 (2020)

3ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav), Research School of Physics, The Australian National University, Canberra ACT 260, Australia