Four channel integrated DFB laser array with tunable wavelength spacing and 40-Gb/s signal transmission capacity

Author

Lo, Y.H. ; Wang, L.A. ; Gozdz, A.S. ; Lin, P.S.D. ; Iqbal, M.Z. ; Bhat, R. ; Lee, T.P.

Author_Institution

Bellcore, Red Bank, NJ, USA

Volume

11

Issue

4

fYear

1993

fDate

4/1/1993 12:00:00 AM

Firstpage

619

Lastpage

623

Abstract

A four-channel distributed-feedback (DFB) laser array integrated with four heating filaments has been fabricated for high-density wavelength-division-multiplexing systems. The DFB lasers have a threshold current of 4 mA at room temperature. By changing the power in the heater, the wavelength of each laser can be continuously tuned by as much as 5 nm. Therefore, a tunable wavelength spacing anywhere from 1 nm to 2 nm can be achieved. Each laser can operate at 10 Gb/s. However, the bias current has to be increased to avoid the degradation of the eye pattern as the wavelength is thermally tuned over 2 nm. An electric crosstalk of 0.6 dB is measured when two adjacent lasers are modulated at 10 Gb/s simultaneously

Keywords

crosstalk; distributed feedback lasers; laser tuning; optical communication equipment; semiconductor laser arrays; wavelength division multiplexing; 10 Gbit/s; 4 mA; 40 Gbit/s; DFB laser array; WDM systems; adjacent lasers; bias current; continuously tuned laser wavelength; distributed-feedback; electric crosstalk; eye pattern; four-channel; heating filaments; high-density wavelength-division-multiplexing systems; laser modulation; room temperature; signal transmission capacity; threshold current; tunable wavelength spacing; Crosstalk; Electric variables measurement; Heating; Laser tuning; Optical arrays; Power lasers; Temperature; Thermal degradation; Threshold current; Tunable circuits and devices;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.248126

Filename

248126