Coherent light generators – Particular beam control device – Nonlinear device
Patent
1997-02-13
1999-10-05
Bovernick, Rodney
Coherent light generators
Particular beam control device
Nonlinear device
372 26, H01S 310
Patent
active
059635673
ABSTRACT:
A light source for generating many precisely spaced wavelength channels, based on the periodic modulation of light. CW light is periodically amplitude modulated and then coupled to a non-linear fiber where it undergoes additional modulation by the process of self-phase modulation or other non-linear effects. In a general embodiment of the multi-wavelength source (MWS), an optical modulator driven by a periodic electromagnetic signal imposes periodic amplitude modulation on light from a single longitudinal mode CW laser. The light is then coupled to a non-linear medium with an intensity dependent refractive index where it generates higher order spectral sidebands by the process of self-phase modulation and/or other non-linear effects. The frequency spacing between the spectral components is equal to the repetition rate of the modulation. The shape of the spectrum (i.e. the relative amplitudes of the spectral components) can be modified by adjustments to: the amplitude modulated waveform; the optical power of the waveform when coupled to the non-linear medium; and/or characteristics of the non-linear medium such as the non-linear refractive index, the length and the dispersion.
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Korotky Steven K.
Veselka John J.
Bovernick Rodney
Lucent Technologies - Inc.
Wise Robert E.
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