Method and apparatus for detecting short pulses of light of extremely repetitive optical pulse signal, determines the pulse width of the light pulses and their

摘要

Apparatus for determining the pulse width of the extremely-short optical pulse of the input repetitive optical pulse signal, microcavities with (4) an active region located between the lower surface distributed Bragg reflector and the top distributed Bragg reflector (5,6) ( including two-photon absorption detector in the form of a 3) and (2). Fiber optic cable 16 induces perpendicular to (8) incident surface of the detector (2), the input optical pulse signal is combined with the reference light pulse repetitive signal. Forming a reference optical pulse signal is split polarization splitter (19), the input optical pulse signal, the reference optical pulse signal, input light is transmitted polarized light coupler (20) delay line through (23) is combined with the pulse signal, induced the incident surface (8) and (16) fiber optic cable. To produce a pulsed beam current microcavity (3) in the delay line (23) is operated so as to out-of-phase and phase with each other alternating light pulses of each reference light pulse signal and the input optical pulse signal that. Monitoring circuitry (14) monitors the pulse photocurrent, the pulse width of the light pulses is determined as the full width at half maximum of the pulsed beam current traces. By varying the incident angle when the reference light pulse signal input and is incident on (8) incident surface, it is possible to adjust the system to match the input optical pulse signals of different wavelengths within a predetermined wavelength range.