Abstract
A high-efficiency optical filter, based on a counter-propagating wavelength converter in ZnTe, is theoretically demonstrated. The filter has extremely narrow bandwidth of 0.5 Å corresponding to pump 0.3 W power and 1 cm length of quasi-phase-matching (QPM) grating, tunable over several nanometers of bandwidth by combination of the grating length and pump power variation. The presented scheme is also a candidate for a wavelength-dependant switch.
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Qin, YQ., Wintner, E. Optical filtering and switching using counter-propagating wavelength converter. Optical and Quantum Electronics 35, 35–46 (2003). https://doi.org/10.1023/A:1021808304587
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DOI: https://doi.org/10.1023/A:1021808304587