Spatial mode filters realized with multimode interference couplers
Optics Letters, Vol. 21, Issue 11, pp. 836-838 (1996)
http://dx.doi.org/10.1364/OL.21.000836
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Abstract
Spatial mode filters based on multimode interference couplers (MMI’s) that offer the possibility of splitting off antisymmetric from symmetric modes are presented, and realizations of these filters in InGaAsP/InP are demonstrated. Measured suppression of the antisymmetric first-order modes at the output for the symmetric mode is better than 18 dB. Such MMI’s are useful for monolithically integrating mode filters with all-optical devices, which are controlled through an antisymmetric first-order mode. The filtering out of optical control signals is necessary for cascading all-optical devices. Another application is the improvement of on-off ratios in optical switches.
© 1996 Optical Society of America
Citation
J. Leuthold, R. Hess, J. Eckner, P. A. Besse, and H. Melchior, "Spatial mode filters realized with multimode interference couplers," Opt. Lett. 21, 836-838 (1996)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-21-11-836
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