Control device for laser diodes
AssigneeInfineon Technologies AG
InventorsKarl Schrödinger, Toralf Oheim
Life of this patent
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Abstract
A device for adjusting laser diodes includes a pilot signal adjustment device for adjusting the signal current using a pilot signal frequency that is modulated onto the signal current. The device includes a bias direct current source supplying the laser diode with a bias direct current. A switching device switches the adjustment device between a state where the pilot signal adjustment device is connected to the modulator and the bias direct current source such that the signal current can be adjusted using the pilot signal adjustment device, and another state where the modulator is connected to the temperature compensation device such that the signal flow can be adjusted and/or controlled by the temperature compensation device.
Claims13
A control device for at least one laser diode, comprising:
- a bias direct current source connected to the laser diode and providing a bias direct current to the laser diode;
- a modulator for modulating a signal current for the laser diode in accordance with a data signal received by said modulator;
- a temperature compensation device switchably connected to said modulator for controlling the signal current as a function of temperature changes;
- a pilot tone control device for controlling the signal current by modulating a pilot tone frequency onto the signal current;
- and
- a first switching device for switching between a first state and a second state;
- in said first state, said pilot tone control device being connected to said modulator and said bias direct current source for regulating the signal current using said pilot tone control device;
- and
- in said second state, said modulator being connected to said temperature compensation device causing said temperature compensation device to control the signal current.
Dependencies are inferred from the claim text.