Title :
Low-threshold four-wavelength DFB laser array for multigigabit/s high-density WDM systems applications
Author :
Wang, L.A. ; Lo, Y.H. ; Iqbal, M.Z. ; Young, J. ; Lin, P.S.D. ; Gozdz, A.S.
Author_Institution :
Bellcore, Red Bank, NJ, USA
Abstract :
A high-speed four-wavelength distributed-feedback (DFB) laser array with narrow wavelength spacings ( approximately 3 nm), very low-threshold currents ( approximately 5 mA), and all wavelengths, and operating (1540-1550 nm) within the erbium-doped fiber amplifier bandwidth has been fabricated. Electrical crosstalk of less than -25 dB up to 5 GHz was measured and a small wavelength drift caused by heating effects was observed for adjacent lasers. However, neither the electrical crosstalk nor the thermal effect causes any sensitivity penalties in a high-speed wavelength-division multiplexing transmission system.<>
Keywords :
distributed feedback lasers; frequency division multiplexing; multiplexing equipment; optical communication equipment; semiconductor laser arrays; 1540 to 1550 nm; 5 mA; diode lasers; distributed-feedback; electrical crosstalk; erbium-doped fiber amplifier bandwidth; four-wavelength DFB laser array; heating effects; high-density WDM systems; high-speed; low-threshold currents; narrow wavelength spacings; small wavelength drift; thermal effect; wavelength-division multiplexing transmission system; Bandwidth; Crosstalk; Erbium-doped fiber amplifier; Erbium-doped fiber lasers; Fiber lasers; Laser beam cutting; Masers; Optical arrays; Optical coupling; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
