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Micromachines 2012, 3(1), 36-44; doi:10.3390/mi3010036
Article

Design of an Angle Detector for Laser Beams Based on Grating Coupling

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Received: 24 December 2011; in revised form: 21 January 2012 / Accepted: 21 January 2012 / Published: 1 February 2012
(This article belongs to the Special Issue Nano-photonic Devices)
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Abstract: A novel angle detector for laser beams is designed in this paper. It takes advantage of grating coupling to couple the incident light into a slab waveguide; and, the incident light’s angle can be determined by reading the outputs of light detectors within the waveguide. This device offers fast-responding on-chip detection of laser beam’s angle. Compared to techniques based on quadrant photodiodes or lateral effect photodiodes, the device in this paper has far greater detectable range (up to a few degrees, to be specific). Performance of the laser angle detector in this paper is demonstrated by finite-difference-time-domain simulations. Numerical results show that, the detectable angle range can be adjusted by several design parameters and can reach [−4°, 4°]. The laser beam angle detector in this paper is expected to find various applications such as ultra-fast optical interconnects.
Keywords: diffraction gratings; guided waves; laser beam steering diffraction gratings; guided waves; laser beam steering
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Saha, T.K.; Lu, M.; Ma, Z.; Zhou, W. Design of an Angle Detector for Laser Beams Based on Grating Coupling. Micromachines 2012, 3, 36-44.

AMA Style

Saha TK, Lu M, Ma Z, Zhou W. Design of an Angle Detector for Laser Beams Based on Grating Coupling. Micromachines. 2012; 3(1):36-44.

Chicago/Turabian Style

Saha, Tapas Kumar; Lu, Mingyu; Ma, Zhenqiang; Zhou, Weidong. 2012. "Design of an Angle Detector for Laser Beams Based on Grating Coupling." Micromachines 3, no. 1: 36-44.


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