Title :
Penalty-free propagation over 600 km of non-dispersion-shifted fiber at 2.5 Gb/s using a directly laser modulated transmitter
Author :
Mahgrefteh, D. ; Cho, P.S. ; Goldhar, J. ; Mandelberg, H.I.
Author_Institution :
Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA
Abstract :
Summary form only given. Long-haul DWDM systems require compact, low-chirp, transmitters with stabilized frequency. External modulation transmitters are expensive and require additional optics for wavelength stabilization. Directly modulated external-cavity fiber-grating lasers have frequency stability, but are limited to a penalty free propagation distance of /spl sim/117 km in non-dispersion-shifted (NDS) fiber at 2.5 Gb/s. We use a fiber-grating high-pass filter after a DFB laser transmitter and demonstrate propagation over 600 km of NDS fiber at 2.5 Gb/s with <1 GHz wavelength stability. To the best of our knowledge, this is the longest propagation distance at 2.5 Gb/s in NDS fiber using direct modulation.
Keywords :
diffraction gratings; distributed feedback lasers; error statistics; high-pass filters; laser feedback; laser frequency stability; optical fibre communication; optical fibre dispersion; optical fibre filters; optical modulation; optical transmitters; 1 GHz; 2.5 Gbit/s; 600 km; DFB laser transmitter; compact low-chirp transmitters; direct modulation; directly laser modulated transmitter; directly modulated external-cavity fiber-grating lasers; external modulation transmitters; fiber-grating high-pass filter; frequency stability; long-haul DWDM systems; nondispersion-shifted fiber; penalty free propagation distance; penalty-free propagation; propagation; propagation distance; stabilized frequency; wavelength stability; wavelength stabilization; Band pass filters; Chirp modulation; Erbium-doped fiber lasers; Gratings; Laser stability; Optical filters; Optical modulation; Optical propagation; Optical receivers; Optical transmitters;
Conference_Titel :
Lasers and Electro-Optics, 1999. CLEO '99. Summaries of Papers Presented at the Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-595-1
DOI :
10.1109/CLEO.1999.834057
