Compact low crosstalk 1x2 wavelength selective switch architectures

Sarun Sumriddetchkajorn; Khunat Chaitavon

doi:10.1117/12.572284

11 February 2005 Compact low crosstalk 1x2 wavelength selective switch architectures

Sarun Sumriddetchkajorn, Khunat Chaitavon

Proceedings Volume 5625, Optical Transmission, Switching, and Subsystems II; (2005) https://doi.org/10.1117/12.572284
Event: Asia-Pacific Optical Communications, 2004, Beijing, China

Abstract

Thin film filter (TF)-based 1x2 wavelength selective switch (WSS) architectures are introduced. Our key idea is to locate a movable mirror orientated at a desired angle close to the TF to switch the desired wavelength optical beams to the wanted switch ports. Our first proposed WSS is in the transmissive mode where the surfaces of the TF and the movable mirror are parallel to each other and it provides a moderate optical isolation. Another WSS structure is in reflective configuration in which the movable mirror is tilted with respect to the surface of the TF and when combined with the optical circulator leads to a very low optical coherent crosstalk. Our experiment using a commercially available TF and a movable mirror shows that our transmissive-mode WSS provides a -18.87 dB optical coherent crosstalk while a much improved < -53 dB optical coherent crosstalk can be obtained between the two switching ports in our reflective-mode WSS structure. Our reflective 1x2 WSS also gives a higher optical loss due to the use of an optical circulator. Low polarization dependent loss of < 0.1 dB is determined for both WSS structures.

Citation Download Citation

Sarun Sumriddetchkajorn and Khunat Chaitavon "Compact low crosstalk 1x2 wavelength selective switch architectures", Proc. SPIE 5625, Optical Transmission, Switching, and Subsystems II, (11 February 2005); https://doi.org/10.1117/12.572284

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