Devices and methods for tuning vertical-cavity surface-emitting lasers with modulated bit signals
Assigneeams International AG
InventorsColin Steele, Catalin Lazar, Goran Stojanovic
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Abstract
A tuning arrangement for a vertical-cavity surface-emitting laser (VCSEL) may include a delta sigma modulator and a current source. The delta sigma modulator may be configured to generate a bitstream comprising bit signals, and the current source may be configured to provide a current to the VCSEL in a switchable manner depending on a control signal. The bitstream is generated based on a target state signal and the control signal corresponds to or is derived from the bit signals of the bitstream.
Claims9
A tuning arrangement for a vertical-cavity surface-emitting laser wherein the tuning arrangement comprises:
- a vertical-cavity surface-emitting laser;
- a delta sigma modulator configured to generate a bitstream comprising bit signals;
- and
- a current source configured to provide a current to the vertical-cavity surface-emitting laser in a switchable manner based on a control signal;
- wherein:
- the bitstream is generated based on a target state signal;
- the control signal corresponds to or is derived from the bit signals of the bitstream;
- and
- the tuning arrangement is configured to tune an output wavelength of the vertical-cavity surface-emitting laser.
Dependencies are inferred from the claim text.