Patent ID: 9231367
Filing Date: 2016-01-05
CPC Classification: B82Y,H01S,H04B

Claim Text:
1. A laser chip comprising: a laser including an active region; an optical amplifier integrated in the laser chip in front of and in optical communication with the laser; a first electrode electrically coupled to the active region; and a second electrode electrically coupled to the optical amplifier; wherein the first electrode and the second electrode are configured to be electrically coupled to a common direct modulation source, wherein the common direct modulation source is configured to supply a modulation signal having a data rate of about 10 gigabits per second or higher, wherein in response to application of the modulation signal to the first electrode, the DBR laser is configured to generate an optical signal having a frequency modulation profile exhibiting both transient chirp and adiabatic chirp, a ratio of transient chirp to adiabatic chirp being in a range from 1:3 to 1:4.