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The gamma-ray induced behavior of a saturable absorber in outer space was tested by pump-probe experiments using a femtosecond laser. The test reveals that after gamma-ray exposure of ∼120 krad, the modulation depth and saturation fluence of the saturable absorber vary from 6 to 3 % and 40 to 105 μJ/cm2, respectively, without no conceivable change in the relaxation time.
Real-time monitoring and control (RMC) of the operational state of a femtosecond laser is essential for its practical uses with reliability. For the purpose, we present a compact all-fiber-based RMC system which automatically performs the task of supervising multiple key pulse parameters at a same time in both the temporal and frequency domain in situ with the femtosecond laser being in operation.
Femtosecond pulse lasers offer breakthroughs in precision metrology particularly in the fields of time, distance and spectroscopy. This advance attracts much attention to extend today's space missions by improving the precision of remote sensing and control capabilities. In this presentation, we introduce how femtosecond lasers are being investigated for space explorations in the near future. Special...
We demonstrate a dead-zone-free dual-comb interferometer for absolute long distance measurements. The non-ambiguity range is extended without dead zones to ∼1.2 km by adjusting the synthetic wavelength for long target distances.
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