Patent ID: 11901696
Assignee: GOOGLE LLC
Field: Optics (Instruments)
Classification: CPC H | IPC H

Claim 10:
11. A laser driving circuit comprising:
a tail current source configured to:
deliver a first bias current to an anode of a gain-section diode disposed on a shared substrate of a tunable laser, the tunable laser comprising an Electro-absorption Modulated tunable laser; and
deliver a second bias current to an anode of a phase-section diode disposed on the shared substrate of the tunable laser;

a burst control stage configured to receive a burst mode signal indicative of a burst-on state or a burst-off state, the burst control stage configured to:
when the burst mode signal is indicative of the burst-off state, deliver the first bias current to the anode of the gain-section diode and deliver the second bias current to the anode of the phase-section diode, wherein the first bias current is less than the second bias current; and
when the burst mode signal is indicative of the burst-on state, deliver the first bias current to the anode of the gain-section diode and deliver the second bias current to the anode of the phase-section diode, wherein the first bias current is greater than the second bias current,

wherein:
the first bias current is equal to a tail current minus the second bias current; and
the second bias current is equal to the tail current minus the first bias current.