Patent ID: 8223810
Filing Date: 2012-07-17
Classification: G02F,H01S

Abstract:
1. A method of generating laser pulses having at least a predefined amplitude or phase or polarization at a distal end of an optical transmission system, the optical transmission system comprising at least one optical fiber, the method comprising the steps of: generating laser pulses and inputting the laser pulses into a pulse shaper to form modulated laser pulses having laser pulse energy; inputting the modulated laser pulses into a proximal end of the optical transmission system; reflecting at least a part of the laser pulse energy from the distal end of the optical transmission system back to the proximal end of the optical transmission system such that reflected laser pulses are formed; measuring the reflected laser pulses at the proximal end of the optical transmission system; calculating an amplitude value, phase value, polarization value, or combination thereof with respect to a current amplitude, phase, polarization, or combination thereof at the distal end of the optical transmission system, based on the measured reflected laser pulses at the proximal end of the optical transmission system; calculating a control signal for controlling the pulse shaper, wherein at least one physical parameter of the optical fiber and the calculated amplitude value, phase value, polarization value, or combination thereof are taken into account; and applying the control signal to the pulse shaper and modulating at least an amplitude or a phase or a polarization of the generated laser pulses such that said modulated laser pulses are formed with the predefined amplitude or phase or polarization.