Thermal Compensation for Burst-Mode Laser Wavelength Drift

摘要

An apparatus comprising a burst-mode laser comprising an active layer and configured to emit an optical signal during a burst period, wherein a temperature change of the burst-mode laser causes the optical signal to shift in wavelength, and a heater thermally coupled to the active layer and configured to reduce a wavelength shift of the optical signal during the burst period by applying heat to the active layer based on timing of the burst period.

主权项

1. An apparatus comprising:
a burst-mode laser comprising an active layer and configured to emit an optical signal during a burst period, wherein a temperature change of the burst-mode laser causes a wavelength shift of the optical signal; and a heater thermally coupled to the active layer and configured to:
receive an electric current for generating heat, wherein the electric current is at a first level during a first period before a start of the burst period, at a second level during a second period after the start, and at zero during a third period after the second period, and wherein the first level is greater than the second level; andapply the heat to the active layer before the start and based on timing of the burst period in order to substantially stabilize a temperature of the burst-mode laser during the burst period and to reduce the wavelength shift during the burst period.