Patent ID: 6327062
Filing Date: 2001-12-04
Classification: H04B

Abstract:
An optical system having n channels, the channels having sequential central wavelengths of .lambda.1, .lambda.2, .lambda.3 to .lambda.n respectively, each of the n channels having a bandwidth of q nanometers, wherein channel 1 having a central wavelength of .lambda.1, has a lowest wavelength of .lambda.1-q/2 and a highest wavelength within its band of .lambda.1+q/2 and subsequent channels have a central wavelength of .lambda.s and have a lowest wavelength of .lambda.s-q/2 and a highest wavelength within its band of .lambda.s+q/2, for s=2, 3, . . . n, the optical system comprising:multiplexor/demultiplexor for multiplexing and demultiplexing signals of different wavelengths to and from a waveguide;n uncooled lasers for being optically coupled to the waveguide, each of the n lasers having a lasing wavelength corresponding to a different one of the n channels, the lasing wavelength of a first laser corresponding to channel 1, having a lasing wavelength of substantially about .lambda..sub.laser1, wherein .lambda.1-q/2.ltoreq..lambda..sub.laser1 <.lambda.1 at an ambient operating temperature, and, a second of the n lasers corresponding to channel 2 has a lasing wavelength of substantially about .lambda..sub.laser2, wherein .lambda.2-q/2.ltoreq..lambda..sub.laser2 <.lambda.2 at an ambient operating temperature, and so on, such that subsequent lasers corresponding to subsequent channels s have a lasing wavelength substantially about .lambda..sub.laser s, wherein .lambda.s-q/2.ltoreq..lambda..sub.laser s<.lambda.s at an ambient operating temperature.