Title :
Design of free space WDM router based on holographic concave grating
Author :
Churin, E.G. ; Bayvel, P.
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. Coll. London, UK
Abstract :
A design for a 91/spl times/91 router with 0.33 nm channel spacing using a stationary anastigmatic Littrow mount of a holographic concave grating is reported. A simplified method of concave grating analysis is developed for the evaluation of the wavelength router performance. The coupling losses for all routed channels are within -0.9 dB and the power penalty due to coherent crosstalk caused by aberrations and diffraction at the aperture is negligibly small.
Keywords :
aberrations; holographic gratings; light coherence; optical communication equipment; optical crosstalk; optical losses; spectrometer accessories; wavelength division multiplexing; 91/spl times/91 router; aberrations; all routed channels; aperture diffraction; channel spacing; coherent crosstalk; concave grating analysis; coupling losses; free space WDM router design; holographic concave grating; power penalty; stationary anastigmatic Littrow mount; wavelength router performance; Diffraction gratings; Fiber gratings; Holographic optical components; Holography; Integrated optics; Optical crosstalk; Optical scattering; Optical surface waves; Wavelength division multiplexing; Wavelength routing;
Journal_Title :
Photonics Technology Letters, IEEE
