Optical waveguides – Temporal optical modulation within an optical waveguide
Patent
1995-09-14
1997-02-18
Ullah, Akm E.
Optical waveguides
Temporal optical modulation within an optical waveguide
G02F 101
Patent
active
056048270
ABSTRACT:
The present invention provides a method for selecting a semiconductor integrated optical modulator/laser light source device comprising a modulator section and a laser section. The method comprises the following steps. The laser section is supplied with a direct current which is equal to or larger than a threshold current for allowing the laser section to show a laser emission when the modulator section is supplied with a pulse signal for allowing the modulator section to show a pulse modulation so as to allow a tight emitted directly from a facet of the laser section to show a transmission through a light wavelength dispersion medium within which the light on transmission shows a dispersion in wavelength. An intensity of the light having shown the dispersion in wavelength is measured to find a coefficient of variation in intensity of the light, wherein the variation is due to a wavelength chirping. There is verified the fact that the coefficient of variation in intensity of the light be below a predetermined reference level.
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NEC Corporation
Ullah Akm E.
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