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US 7,453,629 B2Granted
Semiconductor optical amplifier pulse reshaper
AssigneeLucent Technologies Inc.
InventorsHongxing Dai, Peng Wang, Jinpin Ying
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Abstract
A system includes a pulse reshaper for reshaping and re-amplifying optical signals in a communications network. In one embodiment, a vertical cavity semiconductor optical amplifier (VCSOA) device, comprising dual mode reflectors optically cooperating at each of an input signal wavelength (λs) and an offset wavelength (λc) proximate the input signal wavelength (λs) to provide thereby non-linear amplification of input signal (λs).
Claims16
A vertical cavity semiconductor optical amplifier (VCSOA), comprising:
- dual mode reflectors having respective first reflective portions defining a first mode and respective second reflective portions defining a second mode, the second reflective portions being inside a region defined by the first reflective portions;
- wherein the dual mode reflectors are configured for providing an output having a first wavelength (λs) and an offset wavelength (λc) proximate the first wavelength (λs), the first and second reflective portions having higher reflectivities at the offset wavelength (λc) than at the first wavelength (λs) for implementing non-linear amplification of an input signal at the first wavelength (λs) by competition between the first and second modes.
A method of operating a vertical cavity semiconductor optical amplifier (VCSOA), comprising:
- providing dual mode reflectors having respective first reflective portions defining a first mode and respective second reflective portions defining a second mode, the second reflective portions being inside a region defined by the first reflective portions;
- configuring the dual mode reflectors for providing an output having a first wavelength (λs) and an offset wavelength (λc) proximate the first wavelength (λs);
- wherein the first and second reflective portions have higher reflectivities at the offset wavelength (λc) than at the first wavelength (λs);
- and
- wherein the first reflective portions and the second reflective portions are each characterized by respective effective cavity lengths, each of the effective cavity lengths being given by an equation:
- L=nλ/2, where n is an integer;
- and the equation is satisfied for wavelength λ at both the first wavelength (λs) and the offset wavelength (λc).
4 more elements
Dependencies are inferred from the claim text.