Title :
Low-Cost Optoelectronic Self-Injection-Locked Oscillators
Author :
Lee, Kwang-Hyun ; Kim, Jae-Young ; Choi, Woo-Young ; Kamitsuna, Hideki ; Ida, Minoru ; Kurishima, Kenji
Author_Institution :
Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul
fDate :
7/1/2008 12:00:00 AM
Abstract :
We demonstrate a new configuration for an optoelectronic self-injection-locked (SIL) oscillator, where a part of the electrical output signal is self-injected after passing through a long optical delay line for output phase-noise reduction. The SIL oscillator consists of an electrical free-running oscillator and a long optical feedback loop. For the compact and low cost configuration, the free-running oscillator is realized with an InP HPT-based monolithic oscillator and electrical-to-optical conversion is carried out by two low-speed and low-cost laser diodes. With this new configuration, we achieve more than 55-dB phase-noise reduction at 10-kHz frequency offset from the center frequency of about 10.8 GHz by injecting 8-dBm optical signals without using any high-speed optoelectronic components.
Keywords :
III-V semiconductors; indium compounds; injection locked oscillators; integrated optoelectronics; optical delay lines; optoelectronic devices; phase noise; semiconductor lasers; HPT-based monolithic oscillator; InP; electrical output signal; electrical-optical conversion; laser diodes; low cost configuration; optical delay line; optical feedback loop; optoelectronic oscillators; phase noise reduction; self-injection-locked oscillators; Costs; Delay lines; Frequency; High speed optical techniques; Optical devices; Optical feedback; Optical modulation; Optical noise; Optical resonators; Oscillators; InP monolithic oscillator; optoelectronic oscillator (OEO); phase-noise reduction; self-injection locking (SIL);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2008.925189
