Electro-optic modulator using multiple quantum well structure ha

Details Electro-optic modulator using multiple quantum well structure ha Electro-optic modulator using multiple quantum well structure ha

1994-04-22

1996-08-27

Nelms, David C.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359295, 257 21, 257184, 257656, G02F 1015

Patent

active

055506704

ABSTRACT:
An optoelectronic semiconductor component (1) for modulating a supplied light beam is described, where the optoelectronic semiconductor component has a pin-structure (2, 3, 4). The invention provides that M semiconductor structures with carriers localized in at least one dimension (Q1-Q20; CB1-CB10) are arranged in at least two groups (G1-G10), where the semiconductor structures with carriers localized in at least one dimension belonging to one group (G1-G10), are separated by barriers (CB1-CB10), which essentially allow Starkladder transitions between the individual semiconductor structures (Q1-Q20; CB1-CB10) of each group (G1-G10), and the individual groups (G1-G10) of such coupled semiconductor structures (Q1-Q20; CB1-CB10) are separated by other barriers (B1-B11), which essentially prevent Stark-ladder transitions between the active layers (Q1-Q20) of the semiconductor structures (Q1-Q20; CB1-CB10) of a group (G1-G10) and an active layer (Q1-Q20) of another group.

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"InGaA1As Multiple Quantum Well Optical Modulators"by K. Wakita et al-NTT Opto-Elecgtronics Laboratories, pp. 115-116.
"Optical study of the electronic states of In.sub.0.53 Ga.sub.0.47 As/In.sub.0.52 A1.sub.0.48 As quantum wells in high electric fields"by K. Satzke, et al-Physical Review B, vol. 43, No. 3, 15 Jan. 1991-1991 The American Physical Society. pp. 2263-2271.
IEEE Journal of Quantum Electronics., Bd.27, Nr.3, Marz 1991,NEW YORK US Seiten 702-707, XP000227522 Y.C. Chan et al. "Field induced optical effects in coupled quantum wells", pp. 702-707.
Journal of Applied Physics, Bd.65, Nr.1, 1. Jan. 1989, NEW YORK US Seiten 383-385, XP000098015 N. Debbar et al. "Coupled GaAs/A1GaAs quantum-well electroabsorption modulators for low-electric-field optical modulation", pp. 383-385.

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