H. Takara, I. Shake, S. Kawanishi, Y. Yamabayashi, K. Magari, Y. Tohmori, K. Takiguchi, I. Ogawa, and A. Himeno, "Integrated Optical Time-division-multiplexer based on Planar Lightwave Circuit,"
in Optical Fiber Communication Conference and the International Conference on Integrated Optics and Optical Fiber Communication,
OSA Technical Digest Series
(Optical Society of America, 1999), paper FI2.