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US 2002/0159140 A1Published application
Multichannel laser transmitter suitable for wavelength-division multiplexing applications
AssigneeMassachusetts Institute of Technology
InventorTso Yee Fan
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Abstract
A laser transmitter capable of transmitting large numbers of WDM channels but requiring locking of only a single channel. Each of the channels can be individually modulated using an external modulator.
Claims18
A multi-wavelength light-generation system comprising:
- a. an array of optical gain elements producing a plurality of spatially separated optical outputs;
- b. an external cavity optically coupled to the gain elements for controlling the wavelengths of the spatially separated outputs through the respective optical gain elements;
- c. an array of modulators facilitating individual modulation of the spatially separated outputs;
- and
- d. a dispersive optical system for spatially combining the modulated system outputs.
2 more elements
A method of transmitting information by wavelength-division multiplexing, the method comprising the steps of:
- a. producing a plurality of spatially separated optical outputs;
- b. amplifying the outputs in an external cavity configured to control wavelengths associated with the spatially separated outputs;
- c. individually modulating each of the spatially separated outputs to encode information therein;
- and
- d. spatially combining the modulated outputs.
2 more elements
Dependencies are inferred from the claim text.