A Subcarrier-Multiplexed Coherent FSK System Using a Mach-Zehnder Modulator with Automatic Bias Control

Q. Jiang; M. Kavehrad

doi:10.1109/68.238262

A Subcarrier-Multiplexed Coherent FSK System Using a Mach-Zehnder Modulator with Automatic Bias Control

Q. Jiang
, M. Kavehrad

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

We demonstrate a subcarrier-multiplexed coherent optical transmission system using a push-pull Mach-Zehnder intensity modulator. Six subcarrier channels cover a six-octave bandwidth and are frequency-shift keying (FSK) modulated at 45 Mb/s. With an optical phase modulation index of 0.38, a receiver sensitivity of - 36 dBm is obtained. Second-order intermodulation is canceled by more than 20 dB due to the balanced structure of the modulator. This results in an 8-dB improvement in the receiver sensitivity compared to the system using an optical phase modulator. We also demonstrate a simple automatic bias-control scheme for the Mach-Zehnder modulator. It utilizes the optical signal from the complementary output port of the dual-output modulator.

Original language	English (US)
Pages (from-to)	941-943
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	5
Issue number	8
DOIs	https://doi.org/10.1109/68.238262
State	Published - Aug 1993

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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10.1109/68.238262

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title = "A Subcarrier-Multiplexed Coherent FSK System Using a Mach-Zehnder Modulator with Automatic Bias Control",

abstract = "We demonstrate a subcarrier-multiplexed coherent optical transmission system using a push-pull Mach-Zehnder intensity modulator. Six subcarrier channels cover a six-octave bandwidth and are frequency-shift keying (FSK) modulated at 45 Mb/s. With an optical phase modulation index of 0.38, a receiver sensitivity of - 36 dBm is obtained. Second-order intermodulation is canceled by more than 20 dB due to the balanced structure of the modulator. This results in an 8-dB improvement in the receiver sensitivity compared to the system using an optical phase modulator. We also demonstrate a simple automatic bias-control scheme for the Mach-Zehnder modulator. It utilizes the optical signal from the complementary output port of the dual-output modulator.",

author = "Q. Jiang and M. Kavehrad",

note = "Funding Information: Manuscript received March 31, 1993; revised May 14, 1993. This work was supported by the Canadian Institute for Telecommunications Research under the NCE program of the Government of Canada. The authors are with the Department of Electrical Engineering, University of Ottawa, Ottawa, Ont., Canada K1N 6N5. IEEE Log Number 9211054.",

year = "1993",

month = aug,

doi = "10.1109/68.238262",

language = "English (US)",

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pages = "941--943",

journal = "IEEE Photonics Technology Letters",

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T1 - A Subcarrier-Multiplexed Coherent FSK System Using a Mach-Zehnder Modulator with Automatic Bias Control

AU - Jiang, Q.

AU - Kavehrad, M.

N1 - Funding Information: Manuscript received March 31, 1993; revised May 14, 1993. This work was supported by the Canadian Institute for Telecommunications Research under the NCE program of the Government of Canada. The authors are with the Department of Electrical Engineering, University of Ottawa, Ottawa, Ont., Canada K1N 6N5. IEEE Log Number 9211054.

PY - 1993/8

Y1 - 1993/8

N2 - We demonstrate a subcarrier-multiplexed coherent optical transmission system using a push-pull Mach-Zehnder intensity modulator. Six subcarrier channels cover a six-octave bandwidth and are frequency-shift keying (FSK) modulated at 45 Mb/s. With an optical phase modulation index of 0.38, a receiver sensitivity of - 36 dBm is obtained. Second-order intermodulation is canceled by more than 20 dB due to the balanced structure of the modulator. This results in an 8-dB improvement in the receiver sensitivity compared to the system using an optical phase modulator. We also demonstrate a simple automatic bias-control scheme for the Mach-Zehnder modulator. It utilizes the optical signal from the complementary output port of the dual-output modulator.

AB - We demonstrate a subcarrier-multiplexed coherent optical transmission system using a push-pull Mach-Zehnder intensity modulator. Six subcarrier channels cover a six-octave bandwidth and are frequency-shift keying (FSK) modulated at 45 Mb/s. With an optical phase modulation index of 0.38, a receiver sensitivity of - 36 dBm is obtained. Second-order intermodulation is canceled by more than 20 dB due to the balanced structure of the modulator. This results in an 8-dB improvement in the receiver sensitivity compared to the system using an optical phase modulator. We also demonstrate a simple automatic bias-control scheme for the Mach-Zehnder modulator. It utilizes the optical signal from the complementary output port of the dual-output modulator.

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JO - IEEE Photonics Technology Letters

JF - IEEE Photonics Technology Letters

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A Subcarrier-Multiplexed Coherent FSK System Using a Mach-Zehnder Modulator with Automatic Bias Control

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