High On/Off Ratio and Low Applied Voltage Optical Modulator Using Multiple Quantum Well Structures

Koichi WAKITA  Masashi NAKAO  Yuichi KAWAMURA  Hajime ASAHI  

IEICE TRANSACTIONS (1976-1990)   Vol.E70   No.4   pp.300-302
Publication Date: 1987/04/25
Online ISSN: 
Print ISSN: 0000-0000
Type of Manuscript: Special Section LETTER (Special Issue: Papers from 1987 National Convention IEICE)
Category: Quantum Electronics

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A large on/off ratio with low drive voltage optical modulation is realized by using waveguide InGaAs/InAlAs multiple quantum well (MQW) structures grown by molecular beam epitaxy (MBE). These waveguide MQW optical modulators have a modulation on/off ratio of 90:1 (19.5 dB) at a driving voltage as low as 2.5 V.