Patent ID: 8638485

Claim:
An optical system, comprising: a Fabry-Perot laser positioned on a base and including a gain medium from which an output light signal is generated; a modulator positioned on the base, the modulator including an electro-absorption medium configured to receive at least a portion of the output light signal from the laser, the electro-absorption medium and the gain medium being different materials, field sources that serve as a source of an electrical field in the electro-absorption medium, the electro-absorption medium being a medium in which the Franz-Keldysh effect occurs in response to the formation of the electrical field in the electro-absorption medium; and a peak in an efficiency versus wavelength profile of the modulator being within 20 nm of the peak of the intensity versus wavelength profile for the laser both before and after both the modulator and the laser experience a temperature change of more than 70° C.