Simple Optoelectronic Oscillators Using Direct Modulation of Dual-Section Distributed-Feedback Lasers

Dual-section distributed-feedback laser diodes, in which the electrode on the top of the gain medium is split into two electrically isolated sections, can emit multiple optical modes by self-sustained pulsation at gigahertz frequencies. Here, we report that by directly modulating the laser in an opt...

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Bibliographic Details
Published inIEEE photonics technology letters Vol. 24; no. 23; pp. 2172 - 2174
Main Authors Jun-Hyung Cho, Hyuk-Kee Sung
Format Journal Article
LanguageEnglish
Published IEEE 01.12.2012
Subjects
Direct laser modulation
dual-section laser
Optical fibers
Optical modulation
optoelectronic oscillator (OEO)
Oscillators
Radio frequency
Semiconductor lasers
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Summary:Dual-section distributed-feedback laser diodes, in which the electrode on the top of the gain medium is split into two electrically isolated sections, can emit multiple optical modes by self-sustained pulsation at gigahertz frequencies. Here, we report that by directly modulating the laser in an optoelectronic oscillator (OEO) loop, a pure OEO signal can be obtained without the need for external modulators. In experiments, we successfully generate an 8-GHz OEO signal with a phase noise of -108 dBc/Hz at a 5-kHz offset and a radio-frequency threshold gain of 29 dB.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2012.2224653