TY - JOUR
T1 - Theoretical and experimental study on improved frequency-locked multicarrier generation by using recirculating loop based on multifrequency shifting single-sideband modulation
AU - Zhang, Junwen
AU - Yu, Jianjun
AU - Chi, Nan
AU - Dong, Ze
AU - Shao, Yufeng
AU - Tao, Li
AU - Li, Xinying
PY - 2012
Y1 - 2012
N2 - We propose and experimentally demonstrate a novel scheme to generate optical frequency-locked multicarrier by using a recirculation frequency shifter (RFS) loop based on multifrequency shifting single-sideband (MFS-SSB) modulation with improved tone-to-noise ratio (TNR) performance. Theoretical study shows that we can generate N subcarriers for each round trip without interference by using MFS-SSB, and the recirculation times are reduced to 1/N of the regular scheme based on single-frequency shifting single-sideband (SFS-SSB) modulation. Finally, the double-frequency shifting SSB modulation is carried out for demonstration in our experiments with a double-carrier source from double ECLs and single ECL with carrier suppression. Using this scheme, we successfully generate more than 95 frequency-locked subcarriers with 15-GHz frequency spacing and TNR larger than 25.3 dB and 23.3 dB, respectively. Compared with the results of a regular SFS-SSB scheme, more subcarriers with improved TNR (10 dB and 8 dB for the 95th subcarrier) are obtained.
AB - We propose and experimentally demonstrate a novel scheme to generate optical frequency-locked multicarrier by using a recirculation frequency shifter (RFS) loop based on multifrequency shifting single-sideband (MFS-SSB) modulation with improved tone-to-noise ratio (TNR) performance. Theoretical study shows that we can generate N subcarriers for each round trip without interference by using MFS-SSB, and the recirculation times are reduced to 1/N of the regular scheme based on single-frequency shifting single-sideband (SFS-SSB) modulation. Finally, the double-frequency shifting SSB modulation is carried out for demonstration in our experiments with a double-carrier source from double ECLs and single ECL with carrier suppression. Using this scheme, we successfully generate more than 95 frequency-locked subcarriers with 15-GHz frequency spacing and TNR larger than 25.3 dB and 23.3 dB, respectively. Compared with the results of a regular SFS-SSB scheme, more subcarriers with improved TNR (10 dB and 8 dB for the 95th subcarrier) are obtained.
KW - Multicarrier generation
KW - recirculation frequency shifting
KW - single-sideband modulation
UR - http://www.scopus.com/inward/record.url?scp=84871020118&partnerID=8YFLogxK
U2 - 10.1109/JPHOT.2012.2230249
DO - 10.1109/JPHOT.2012.2230249
M3 - Article
AN - SCOPUS:84871020118
SN - 1943-0655
VL - 4
SP - 2249
EP - 2261
JO - IEEE Photonics Journal
JF - IEEE Photonics Journal
IS - 6
M1 - 6363510
ER -