Amplitude-modulation characteristics of barrier-reservoir and quantum-well electron-transfer (BRAQWET) modulators

Author

Freeman, Paul N. ; Bhattacharya, Pallab ; Jaffe, Mark ; Singh, Jasprit ; Zhang, Xiangkun

Author_Institution

Lucent Technol., AT&T Bell Labs., Murray Hill, NJ, USA

Volume

32

Issue

7

fYear

1996

fDate

7/1/1996 12:00:00 AM

Firstpage

1161

Lastpage

1167

Abstract

We have studied theoretically and experimentally the intensity-modulation characteristics of GaAs-based light modulators based on the barrier-reservoir and quantum-well electron-transfer (BRAQWET) structure. The transmission-voltage characteristics are nonlinear and follow an inverse exponential relationship which is derived herein. It is also seen that a multiple-period BRAQWET structure is unnecessary and partially ineffective for amplitude modulation and that a one-period BRAQWET structure can give comparable results while providing more versatility for the device design. Al_xGa_1-xAs-based guided-wave modulators are demonstrated with a 50% modulation index at a drive voltage of 1 V

Keywords

III-V semiconductors; aluminium compounds; amplitude modulation; electro-optical modulation; electron mobility; gallium arsenide; inverse problems; optical waveguide theory; semiconductor quantum wells; 1 V; Al_xGa_1-xAs-based guided-wave modulators; AlGaAs; BRAQWET modulators; GaAs; GaAs-based light modulators; amplitude modulation; amplitude-modulation characteristics; barrier-reservoir; device design; drive voltage; intensity-modulation characteristics; inverse exponential relationship; modulation index; multiple-period BRAQWET structure; one-period BRAQWET structure; quantum-well electron-transfer modulators; transmission-voltage characteristics; Amplitude modulation; Chirp modulation; Electrons; Nonlinear optics; Optical modulation; Optical transmitters; Phase modulation; Quantum well devices; Quantum wells; Reservoirs;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.517016

Filename

517016