Abstract: The probe for biomodulation is disclosed. The probe includes a semiconductor laser and a drive circuit which causes the laser to generate pulses in bursts. The pulses themselves are of nanosecond or picosecond duration, while the bursts are of millisecond, microsecond, or nanosecond duration. The pulses can be delivered at rates up to 3 GHz. The probe also includes a heat sink as the body contacting portion.