Title :
8-way, 70-km transmission of 33-channel 64-QAM signals utilizing 1.3-μm external modulation system and semiconductor optical amplifier
Author :
Chen Tai ; Way, W.I.
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
fDate :
25 Feb.-1 March 1996
Abstract :
Parallel to the evolution process of deep fiber penetration in the CATV subscriber loop will be the matured development of M-ary quadrature amplitude-modulation (M-QAM) modems and MPEG-II codecs, and the gradual replacement of all AM-VSB video channels by M-QAM digital video channels. Consequently, it is of great interest to see if potentially low-cost semiconductor optical amplifiers can be used to transport multiple channels of ITU-standardized 64-QAM signals. The feasibility of transmitting 33 channels of 64-QAM signals by using a directly modulated 1.3-μm DFB laser and a semiconductor optical amplifier has been recently demonstrated. In this paper, we demonstrate that the system power budget can be significantly increased by using an external modulation system.
Keywords :
cable television; distributed feedback lasers; electro-optical modulation; modems; optical communication equipment; optical fibre subscriber loops; quadrature amplitude modulation; semiconductor lasers; standardisation; television networks; video codecs; 1.3 mum; 70 km; CATV subscriber loop; DFB laser; ITU-standardized 64-QAM signals; M-QAM digital video channels; M-QAM modems; M-ary quadrature amplitude-modulation; QAM signals; deep fiber penetration; directly modulated; external modulation system; km transmission; low-cost semiconductor optical amplifiers; multiple channels; semiconductor optical amplifier; system power budget; Digital modulation; Erbium-doped fiber amplifier; Optical attenuators; Optical fiber communication; Optical fiber subscriber loops; Optical receivers; Optical transmitters; Power lasers; Semiconductor optical amplifiers; Stimulated emission;
Conference_Titel :
Optical Fiber Communications, 1996. OFC '96
Print_ISBN :
1-55752-422-X
DOI :
10.1109/OFC.1996.908217
