The use of gas-filled capillaries and dispersive elements is very popular to compress transform limited pulses, for example at 800nm, for femtosecond millijoule pulse (i.e. starting from 100fs scale).

There are examples of investigations of compression in solid bulk media. I would be very interested in someone sharing his thoughts or even his experimental experience on the problem.

Specifically, how to manage the significant transverse modulation when focusing nonlinearities ariseing in bulk solids. What type of materials could be suitable at 800nm and maybe what are the limits in which this approach does/does not make sense (in light of building a very compact nonlinear compressor for free-space pulses)?

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