Frequency stabilization of semiconductor lasers for applications in coherent communication systems

A. Sollberger, Arja Heinämäki, M. Melchior

Research output: Contribution to journalArticleScientific

13 Citations (Scopus)

Abstract

The stabilization of the mean frequency of a single-mode semiconductor laser used under modulation in a FSK heterodyne transmission system is achieved by a novel method. The frequency stabilization scheme locks the laser to one of the resonance frequencies of a Fabry-Perot interferometer (FPI).
The laser is weakly modulated at a frequency higher than any signal frequencies. Light reflected from the FPI is detected and synchronously demodulated for feedback and current control of the laser. A laser modulated by a pseudorandom sequence with a rate of 140 Mbit/s and an optical frequency deviation of 280 MHz is stabilized with this method against variations in operating temperature and bias current.
The mean optical frequency is maintained within ± 10 MHz for hours. Analysis and experiments confirm that the laser frequency remains stable even when the laser linewidth changes under weak optical feedback.
Original languageEnglish
Pages (from-to)485-491
JournalJournal of Lightwave Technology
Volume5
Issue number4
DOIs
Publication statusPublished - 1987
MoE publication typeB1 Article in a scientific magazine

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telecommunication
stabilization
semiconductor lasers
lasers
Fabry-Perot interferometers
pseudorandom sequences
calculus of variations
operating temperature
feedback control
deviation
modulation

Cite this

Sollberger, A. ; Heinämäki, Arja ; Melchior, M. / Frequency stabilization of semiconductor lasers for applications in coherent communication systems. In: Journal of Lightwave Technology. 1987 ; Vol. 5, No. 4. pp. 485-491.
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abstract = "The stabilization of the mean frequency of a single-mode semiconductor laser used under modulation in a FSK heterodyne transmission system is achieved by a novel method. The frequency stabilization scheme locks the laser to one of the resonance frequencies of a Fabry-Perot interferometer (FPI). The laser is weakly modulated at a frequency higher than any signal frequencies. Light reflected from the FPI is detected and synchronously demodulated for feedback and current control of the laser. A laser modulated by a pseudorandom sequence with a rate of 140 Mbit/s and an optical frequency deviation of 280 MHz is stabilized with this method against variations in operating temperature and bias current. The mean optical frequency is maintained within ± 10 MHz for hours. Analysis and experiments confirm that the laser frequency remains stable even when the laser linewidth changes under weak optical feedback.",
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Frequency stabilization of semiconductor lasers for applications in coherent communication systems. / Sollberger, A.; Heinämäki, Arja; Melchior, M.

In: Journal of Lightwave Technology, Vol. 5, No. 4, 1987, p. 485-491.

Research output: Contribution to journalArticleScientific

TY - JOUR

T1 - Frequency stabilization of semiconductor lasers for applications in coherent communication systems

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AU - Heinämäki, Arja

AU - Melchior, M.

PY - 1987

Y1 - 1987

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AB - The stabilization of the mean frequency of a single-mode semiconductor laser used under modulation in a FSK heterodyne transmission system is achieved by a novel method. The frequency stabilization scheme locks the laser to one of the resonance frequencies of a Fabry-Perot interferometer (FPI). The laser is weakly modulated at a frequency higher than any signal frequencies. Light reflected from the FPI is detected and synchronously demodulated for feedback and current control of the laser. A laser modulated by a pseudorandom sequence with a rate of 140 Mbit/s and an optical frequency deviation of 280 MHz is stabilized with this method against variations in operating temperature and bias current. The mean optical frequency is maintained within ± 10 MHz for hours. Analysis and experiments confirm that the laser frequency remains stable even when the laser linewidth changes under weak optical feedback.

U2 - 10.1109/JLT.1987.1075544

DO - 10.1109/JLT.1987.1075544

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