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Polarization-independent rapidly tunable optical add-drop multiplexer utilizing non-polarizing beam splitters in Ti:LiNbO3 |
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| Authors: | Yong-Wook Shin Won Ju Sung O Eknoyan CK Madsen HF Taylor |
| Institution: | 1. Department of Electrical and Computer Engineering, University of California, Los Angeles, CA, United States;2. California NanoSystems Institute, Los Angeles, CA, United States;3. SiTime, Inc., Santa Clara, CA, United States;4. Department of Mechanical Engineering, Stanford University, Stanford, CA, United States;1. Fraunhofer ENAS, Technologie-Campus 3, Chemnitz, Germany;2. Chemnitzer Werkstoffmechanik GmbH, Technologie-Campus 1, Chemnitz, Germany;1. Tottori University, Tottori, Japan;2. National Institute of Materials Science, Tsukuba, Japan;1. Department of Electronics and Nanoengineering, Aalto University, Espoo, Finland;2. Nanofab, Micronova, Aalto University, Espoo, Finland |
| Abstract: | A polarization-independent four-port wavelength-tunable optical add drop multiplexer (OADM) that utilizes non-polarizing relaxed beam splitters has been analyzed and demonstrated in Ti:LiNbO3 at the 1530 nm wavelength regime. The design utilizes an asymmetric interferometer configuration with strain induced index grating for polarization coupling along its arms that are shifted in position relative to each other. Experimental results of the filter response agree with theoretical predictions. Electrooptic tuning over a range of 15.7 nm at a rate of 0.08 nm/V has been measured. A temporal response < 46 ns to a 20 V step change in tuning voltage has been demonstrated. Fiber-to-fiber insertion loss is ~ 6.5 dB. |
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