Mode competition and switching in three section DBR tunable lasers

Maio, Ivano Adolfo; Bava, G.P.; Montrosset, Ivo

doi:10.1049/ip-j.1991.0008

Cited by 4 publications

(1 citation statement)

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“…The refractive index variation provides phase changing, thus the operating conditions become more favourable to an adjacent mode different from the lasing one and mode jumps eventually occur [7,8]. Usually, in FSK systems a modulation current of a few mA leads to a net frequency excursion of a few GHz.…”

Section: Resultsmentioning

confidence: 99%

2 Gbit/s Direct Detection Transmission System Using Optical Mode Switching in a Two-Electrode DFB Laser

Chawki¹,

Pottier²,

Auffret³

et al. 1992

Journal of Optical Communications

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Optical mode switching between two adjacent modes separated by 1 nm in a two-electrode DFB laser was observed. The switching time between these two modes, limited by the laser structure, was less than 550 ps. Using this optical mode switching, a transmission system up to 2 Gbit/s with a new type of modulation called wavelength shift keying* has been demonstrated.each. The rear electrode of the laser was matched with a 47 Ω resistor. At the receiving end, a solid FabryPerot interferometer (FP) was inserted before a high speed PIN photodiode and used as a tunable optical filter. The FP optical filter has a 320 GHz FreeSpectral-Range (FSR) and a finesse of 50. An optical spectrum analyser with 0.1 nm resolution was used to observe the spectral output of the two-electrode DFB laser.

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Section: Resultsmentioning

confidence: 99%