Title :
Experimental verification of optimum filter bandwidths in direct-detection (N)RZ receivers limited by optical noise
Author :
Strasser, M.M. ; Pfennigbauer, M. ; Pauer, M. ; Winzer, P.J.
Author_Institution :
Inst. fur Nachrichtentech. und Hochfrequenztech., Technische Univ. Wien, Austria
Abstract :
We present measurements performed at a data rate of 10 Gb/s to experimentally verify these theoretical results. In the case of RZ coding we reached a sensitivity of 52 photons per bit (ppb) at a bit-error ratio BER = 10-9, which is about 1.4dB above the quantum limit. To the best of our knowledge, at 10Gb/s, this result is the best previously reported sensitivity for optically preamplified on-off-keying (OOK). The (N)RZ transmitter consisted of a DFB laser with an integrated electroabsorption modulator
Keywords :
Gaussian noise; amplitude shift keying; distributed feedback lasers; electro-optical modulation; electroabsorption; integrated optoelectronics; optical filters; optical noise; optical receivers; optical transmitters; optimisation; sensitivity; 10 Gbit/s; DFB laser; OOK; bit-error ratio; data rate; direct-detection RZ receivers; experimental verification; integrated electroabsorption modulator; optical noise; optically preamplified on-off-keying; optimum filter bandwidths; quantum limit; sensitivity; transmitter; Bandwidth; Bit error rate; High speed optical techniques; Optical filters; Optical network units; Optical noise; Optical receivers; Optical sensors; Optical signal processing; Optical transmitters;
Conference_Titel :
Lasers and Electro-Optics Society, 2001. LEOS 2001. The 14th Annual Meeting of the IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-7105-4
DOI :
10.1109/LEOS.2001.968884
