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Titolo:
THE EFFECTS OF EXTERNAL OPTICAL FEEDBACK ON THE POWER PENALTY OF DFB-LD MODULES FOR 2.5 GB S(-1) OPTICAL-TRANSMISSION SYSTEMS
Autore:
PARK KH; LEE JK; HAN JH; CHO HS; JANG DH; PARK CS; PYUN KE; JEONG J;
Indirizzi:
ELECT & TELECOMMUN RES INST,YUSONG POB 106 TAEJON 305600 SOUTH KOREA KOREA UNIV,DEPT RADIO ENGN SEOUL 136701 SOUTH KOREA
Titolo Testata:
Optical and quantum electronics
fascicolo: 1, volume: 30, anno: 1998,
pagine: 23 - 31
SICI:
0306-8919(1998)30:1<23:TEOEOF>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
SEMICONDUCTOR-LASERS; INTENSITY FLUCTUATION; DIODES; NOISE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
14
Recensione:
Indirizzi per estratti:
Citazione:
K.H. Park et al., "THE EFFECTS OF EXTERNAL OPTICAL FEEDBACK ON THE POWER PENALTY OF DFB-LD MODULES FOR 2.5 GB S(-1) OPTICAL-TRANSMISSION SYSTEMS", Optical and quantum electronics, 30(1), 1998, pp. 23-31

Abstract

We report the effects of external optical feedback on the power penalty of commercial distributed feedback laser diode (DFB-LD) modules for2.5 Gb s(-1) optical transmission systems. External optical feedback presented to the DFB-LD modules causes the excitation of external cavity modes, resulting in increased relative intensity noise (RIN) and intensity noise ripples at low frequency region below 500 MHz. For a 10(-10) bit error rate (BER), the minimum power penalty is as much as 1.25 dB for a feedback ratio of -8.8 dB. An excess power penalty of 0.5 dB per 3 dB increase in the feedback ratio was also empirically obtained. We suggest that optical isolators in 2.5 Gb s DFB-LD modules used in conventional optical transmission systems or WDM systems must have apeak isolation ratio of better than 54.5 dB, instead of the previously recommended 30 dB, for negligible power penalty induced by external optical feedback.

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Documento generato il 02/06/20 alle ore 01:44:05