Patent ID: 9078054
Filing Date: 2015-07-07
Classification: G02B,H04B,H04Q

Abstract:
1. An optical module used in optical communication systems, comprising: an optical device driven by a driving voltage; an arithmetic processing chip including an arithmetic processing circuit that operates according to predetermined firmware and generates an electrical control signal indicating a magnitude of the driving voltage; a voltage generating unit provided outside the arithmetic processing chip, and including an input terminal that receives the control signal from the arithmetic processing chip and an output terminal that provides the driving voltage of a magnitude corresponding to the control signal to the optical device; and a voltage holding unit that holds an output voltage from the output terminal of the voltage generating unit at a constant voltage regardless of an operation state of the arithmetic processing circuit, when the firmware is updated, wherein the voltage holding unit is connected between the arithmetic processing chip and the input terminal of the voltage generating unit, and provides a control signal indicating the constant voltage to the input terminal of the voltage generating unit instead of the control signal indicating the magnitude of the driving voltage, when the firmware is updated.