DocumentCode :
1478878
Title :
Tunable Radio Frequency Generation Using a Graphene-Based Single Longitudinal Mode Fiber Laser
Author :
Ahmad, Harith ; Muhammad, Farah Diana bt ; Zulkifli, Mohd Zamani ; Latif, Amirah Abd ; Harun, Sulaiman Wadi
Author_Institution :
Univ. of Malaya, Kuala Lumpur, Malaysia
Volume :
30
Issue :
13
fYear :
2012
fDate :
7/1/2012 12:00:00 AM
Firstpage :
2097
Lastpage :
2102
Abstract :
A novel, simple, and short cavity design of single longitudinal mode (SLM) tunable erbium-doped fiber ring laser using a graphene-based saturable absorber is proposed and demonstrated as a tunable signal source. The SLM output is then mixed with another output signal from a tunable laser source (TLS) to generate tunable radio frequency (RF) signals. The tunable SLM fiber ring laser uses a short length of 1 m highly doped erbium-doped fiber as the gain medium. Graphene is used as a saturable absorber to generate the SLM operation, as opposed to the commonly used unpumped erbium-doped fiber. The tuning range of the fiber ring laser is determined by a tunable fiber Bragg grating, which can be tuned from 1547.88 to 1559.88 nm. A continuous wavelength spacing tuning range of 0.020-0.050 nm is obtained between the output of the SLM fiber ring laser and the TLS which is then mixed in a 6 GHz bandwidth optical-to-electrical convertor. This generates a corresponding RF signal of between 2.4 and 5.9 GHz with a low variation in output power. The current RF signal generation is limited by the frequency bandwidth of the optical-to-electrical convertor.
Keywords :
Bragg gratings; fibre lasers; graphene; laser modes; laser tuning; optical pumping; ring lasers; C; SLM fiber ring laser; continuous wavelength spacing tuning range; frequency 6 GHz; frequency bandwidth; graphene-based single longitudinal mode fiber laser; optical-to-electrical convertor; tunable fiber Bragg grating; tunable laser source; tunable radio frequency generation; tunable radio frequency signals; unpumped erbium-doped fiber; wavelength 1547.88 nm to 1559.88 nm; Erbium-doped fiber lasers; Masers; Optical fiber couplers; Graphene; single longitudinal mode (SLM) fiber laser; tunable fiber Bragg grating (TFBG); tunable radio frequency generation;
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/JLT.2012.2192099
Filename :
6175091
Link To Document :
بازگشت