[H-10-1] Novel Tunable Ladder-Type Filter for Widely Tunable Laser Diodes S.-H. Jeong、S. Matsuo、Y. Yoshikuni、T. Segawa、Y. Ohiso、H. Suzuki (1.NTT Photonics Laboratories, NTT Corporation) https://doi.org/10.7567/SSDM.2004.H-10-1