Abstract
The temporal shape of compressed picosecond pulses may be controlled through amplitude and phase apodization of the pulse’s frequency spectrum which is spatially dispersed within a grating pulse compressor.1–2 Essentially arbitrary pulse shapes may be fabricated, subject to the limitations imposed by finite bandwidth and resolution. Our experiments are performed with pulses from a cw mode-locked Nd:YAG laser, compressed from 80 ps down to 0.9 ps, using self-phase modulation in a single-mode optical fiber and compression with a grating pair. Undesirable energy in the wings of the compressed pulses has been eliminated, with no concomitant pulse broadening, by means of a spectral windowing technique.1 Furthermore, by masking the amplitude and/or phase of the spatially dispersed frequency components within the compressor, we have synthesized a variety of pulse types, such as bursts of picosecond pulses, odd pulses, bursts of odd pulses, and square pulses.2 In this paper we describe our recent progress in the generation of novel ultrashort pulse shapes, and we discuss the application of phase and amplitude masking for picosecond code generation.
© 1985 Optical Society of America
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