Effective shortening of picosecond pulses emitted by a YAG:Nd³⁺laser

Optical Solitons

“…(25), λ ] becomes Àj = y/cj exp( -ημ -ιη] ξ). Without any loss of generality, the eigenvalues can be assumed to lie on the imaginary axis (Kj = κ = 0).…”

“…Figure 2 shows the compressed pulse for Ν = 10 at ζ = z opt , and compares it to the input pulse shape. In a latter experiment [25], a compression factor of 110 was demonstrated for Ν = 28 by optimizing the fiber length. It is possible to suppress the pedestal by using an intensity discriminator.…”

Nonlinear fiber optics

“…Such "dispersion-free" phase self-modulation was investigated by us in the case of compression of pulses emitted by a YAG:Nd laser with active mode locking and Q switching (when the repetition frequency of the β switching pulses was up to 1 kHz). 47 Laser radiation was coupled by a lens into a single-mode waveguide (in these experiments we used waveguide segments of lengths from 10 cm to 10 m), where the radiation was broadened spectrally and acquired frequency modulation because of phase self-modulation. The duration of a pulse (45 ps) remained constant at the waveguide exit.…”

“…For example, pumping of waveguides with radiation of 60 ps duration generated pulses of duration 2 ps at these edges. 48 A detailed analysis of the method of spectral filtering in the case of STRS in a waveguide can be found in Ref. 49.…”