Title :
Modulated Millimeter-Wave Generation by External Injection of a Gain Switched Laser
Author :
Shams, H. ; Perry, P. ; Anandarajah, P.M. ; Barry, L.P.
Author_Institution :
Radio & Opt. Commun. Lab., Dublin City Univ., Dublin, Ireland
fDate :
4/1/2011 12:00:00 AM
Abstract :
We propose and experimentally demonstrate a novel technique for optical generation of modulated millimeter-wave (mm-wave) by using a gain switched laser (GSL) that is externally injected with a modulated light source. The GSL generates a stream of optical pulses, and these pulses exhibit a small shift in the time domain when the GSL is injected with an on-off keyed (OOK) optical data signal. This time shift can produce a phase modulated mm-wave signal at 60 GHz by suitable optical filtering of the GSL laser output. The system performance was analyzed for data streams at 1.25 Gb/s by using bit-error-rate (BER) measurements for back-to-back (BTB) and 3-km fiber transmission.
Keywords :
amplitude shift keying; distributed feedback lasers; microwave photonics; millimetre wave generation; optical communication equipment; optical fibre communication; optical filters; optical pulse generation; optical wavelength conversion; semiconductor lasers; bit rate 1.25 Gbit/s; distance 3 km; external injection; fiber transmission; frequency 60 GHz; gain switched laser; modulated millimeter wave generation; on-off keyed optical data signal; optical filtering; optical pulse; phase modulated millimeter wave signal; time shift; All-optical up-conversion; gain-switching; millimeter-wave (mm-wave) generation; optical fiber communication; radio-over-fiber (RoF);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2108277
