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High-dynamic-range, single-shot pulse shapes were measured by temporally stacking pulses in a passive, fiber-optic network. The 256 replicas were combined to produce optical shapes with a bandwidth of 10 GHz and a dynamic range of 1800:1. The high fidelity of this system enabled the characterization of arbitrary electrical pulses that were used to shape the optical pulse via an electro-optic modulator...
Gain filtering of higher-order modes in large-mode-area fibers is experimentally demonstrated. While the beam quality degrades with pumping level in conventional fiber lasers, it remains constant in confined-gain fiber lasers due to gain filtering.
High-dynamic-range, single-shot pulse shapes were measured by temporally stacking pulses in a passive, fiber-optic network. The 256 replicas were combined to produce shapes with a bandwidth of 10 GHz and a dynamic range of 1000:1.
Measuring pulse shapes beyond the dynamic range of oscilloscopes is achieved by passive temporal-pulse stacking. Optical pulses are averaged with their time-delayed replicas without introducing additional noise, yielding 3 bits of additional dynamic range.
Precise control of new pulse shapes on the OMEGA laser requires 8.5-GHz, 740:1 dynamic-range measurements at the low-energy front end of the system. We present a new integrated measurement and prediction scheme that meets these demands.
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