Title :
Demonstration of return-to-zero signaling in both OOK and DPSK formats to improve receiver sensitivity in an optically preamplified receiver
Author :
Atia, Walid A. ; Bondurant, Roy S.
Author_Institution :
Lincoln Lab., MIT, Lexington, MA, USA
Abstract :
Summary form only given. We demonstrate record receiver sensitivities at 1O Gb/s using RZ signaling and optimization of the optical filter bandwidths (for a Fabry-Perot optical filter and fixed 10 GHz electrical filter bandwidth). Two different modulation formats are considered: on-off keying (OOK) and differential phase shift keying (DPSK). To the best of our knowledge, this is the first demonstration of encoding phase information on RZ optical pulses to be subsequently decoded in a DPSK demodulator, and as such we christen the term RZDPSK to describe this format. Direct comparison with NRZ signaling and constant intensity DPSK reveals an improvement of about 1 dB in receiver sensitivity
Keywords :
amplitude shift keying; decoding; differential phase shift keying; optical modulation; optical receivers; sensitivity; telecommunication signalling; 10 Gbit/s; DPSK; DPSK demodulator; DPSK format; Fabry-Perot optical filter; OOK; RZ optical pulses; RZ signaling; RZDPSK; differential phase shift keying; electrical filter bandwidth; encoding phase information; modulation formats; optical filter bandwidths; optically preamplified receiver; optimization; receiver sensitivities; receiver sensitivity; return-to-zero signaling; Bandwidth; Decoding; Differential phase shift keying; Differential quadrature phase shift keying; Encoding; Fabry-Perot; Modulation; Optical filters; Optical pulses; Optical receivers;
Conference_Titel :
LEOS '99. IEEE Lasers and Electro-Optics Society 1999 12th Annual Meeting
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-5634-9
DOI :
10.1109/LEOS.1999.813561
