Patent ID: 7869473
Filing Date: 2011-01-11
Classification: H01S

Abstract:
1. A frequency modulated laser comprising: a modulated gain section, an un-modulated gain section, and a passive section; a driving circuit coupled to the modulated and un-modulated gain sections, the driving circuit configured to impose a substantially constant tuning bias on the un-modulated gain section, and a modulating current encoding a data signal on the modulated gain section in order to generate a frequency modulated signal with a substantially flat frequency response; and a tuning electrode and first and second gain electrodes; wherein the substrate is a semiconductor substrate having the tuning electrode positioned on the semiconductor substrate over the passive section, the first gain electrode positioned over the modulated gain section, and the second electrode positioned over the unmodulated gain section; and wherein the tuning electrode and first and second gain electrodes include metal and are bonded to a surface of the semiconductor substrate.