Optical wavelength filtering by diffraction from a surface relief
Optics Letters, Vol. 28, Issue 6, pp. 447-449 (2003)
http://dx.doi.org/10.1364/OL.28.000447
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Abstract
We present an analytical solution to the problem of finding a diffractive surface relief that generates a specific optical amplitude and phase spectral reflection in a particular direction. We show that any discrete finite impulse response filter can be generated to within a multiplicative constant at nonzero frequencies. We propose an implementation of such a filter that works in the visible and the near infrared, based on a two-dimensional array of dual-state tiltable mirrors. A 1024 × 1024 array results in a 1024-tap filter with 10-bit quantization of the impulse response. The applications of such a device include spectroscopy and wavelength-division multiplex switching.
© 2003 Optical Society of America
[Optical Society of America ]
OCIS Codes
(050.1970) Diffraction and gratings : Diffractive optics
(050.2770) Diffraction and gratings : Gratings
(070.2590) Fourier optics and signal processing : ABCD transforms
(120.2440) Instrumentation, measurement, and metrology : Filters
(230.6120) Optical devices : Spatial light modulators
(350.2460) Other areas of optics : Filters, interference
Citation
Ruslan Belikov and Olav Solgaard, "Optical wavelength filtering by diffraction from a surface relief," Opt. Lett. 28, 447-449 (2003)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-28-6-447
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