Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2000/06/25 Vol. E83-CNo. 6pp. 845-854 Type of Manuscript: Special Section PAPER (Special Issue on Advanced Optical Devices for Next Generation High-Speed Communication Systems and Photonic Networks) Category: Semiconductor Lasers Keyword: optical waveguide, beam-expander, laser diode, BPM, FD-TD,