High-bandwidth velocity-matched optical directional coupler modulator in A1GaAs/GaAs

M. Nisa Khan; Anand Gopinath; Julian P.G. Bristo

doi:10.1117/12.2321810

High-bandwidth velocity-matched optical directional coupler modulator in A1GaAs/GaAs

M. Nisa Khan, Anand Gopinath, Julian P.G. Bristo

Electrical and Computer Engineering

Research output: Contribution to journal › Conference article › peer-review

Abstract

We report a design of a very high frequency A1GaAs/GaAs optical modulator using a dielectric loading velocity matching technique. The optical modulator is a directional coupler which is covered with a thin coating of Ta₂0₅ to match the velocities of the lightwave and the if modulating signal to within 2%. The optical and rf characteristics of the modulator are analyzed using the effective index and finite difference methods. The small signal 3 dB bandwidth for the modulator is predicted to exceed 45 GHz and 100 GHz for biasing at the null point and in the linear region respectively, with a maximum modulation voltage of 5V at 830nm wavelength.

Original language	English (US)
Pages (from-to)	260-263
Number of pages	4
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	1582
DOIs	https://doi.org/10.1117/12.2321810
State	Published - Jan 1 1991
Event	Integrated Optoelectronics for Communication and Processing 1991 - Boston, United States Duration: Sep 1 1991 → Sep 7 1991

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title = "High-bandwidth velocity-matched optical directional coupler modulator in A1GaAs/GaAs",

abstract = "We report a design of a very high frequency A1GaAs/GaAs optical modulator using a dielectric loading velocity matching technique. The optical modulator is a directional coupler which is covered with a thin coating of Ta205 to match the velocities of the lightwave and the if modulating signal to within 2%. The optical and rf characteristics of the modulator are analyzed using the effective index and finite difference methods. The small signal 3 dB bandwidth for the modulator is predicted to exceed 45 GHz and 100 GHz for biasing at the null point and in the linear region respectively, with a maximum modulation voltage of 5V at 830nm wavelength.",

author = "{Nisa Khan}, M. and Anand Gopinath and Bristo, {Julian P.G.}",

year = "1991",

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note = "Integrated Optoelectronics for Communication and Processing 1991 ; Conference date: 01-09-1991 Through 07-09-1991",

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TY - JOUR

T1 - High-bandwidth velocity-matched optical directional coupler modulator in A1GaAs/GaAs

AU - Nisa Khan, M.

AU - Gopinath, Anand

AU - Bristo, Julian P.G.

PY - 1991/1/1

Y1 - 1991/1/1

N2 - We report a design of a very high frequency A1GaAs/GaAs optical modulator using a dielectric loading velocity matching technique. The optical modulator is a directional coupler which is covered with a thin coating of Ta205 to match the velocities of the lightwave and the if modulating signal to within 2%. The optical and rf characteristics of the modulator are analyzed using the effective index and finite difference methods. The small signal 3 dB bandwidth for the modulator is predicted to exceed 45 GHz and 100 GHz for biasing at the null point and in the linear region respectively, with a maximum modulation voltage of 5V at 830nm wavelength.

AB - We report a design of a very high frequency A1GaAs/GaAs optical modulator using a dielectric loading velocity matching technique. The optical modulator is a directional coupler which is covered with a thin coating of Ta205 to match the velocities of the lightwave and the if modulating signal to within 2%. The optical and rf characteristics of the modulator are analyzed using the effective index and finite difference methods. The small signal 3 dB bandwidth for the modulator is predicted to exceed 45 GHz and 100 GHz for biasing at the null point and in the linear region respectively, with a maximum modulation voltage of 5V at 830nm wavelength.

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DO - 10.1117/12.2321810

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EP - 263

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

SN - 0277-786X

T2 - Integrated Optoelectronics for Communication and Processing 1991

Y2 - 1 September 1991 through 7 September 1991

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