The spectrum width is expanded from 38 nm to 66 nm,and the output laser pulse is consequently squeezed from 35 fs to 20 fs in the 10 Hz femtosecond regenerative amplifier,with an acoustic-optic programmable dispersive filter(AOPDF) for dispersion pre-compensation and spectrum shaping of the input seed pulses.

In this dissertation, theoretical and experimental studies of non-critical phase-matched femtosecond optical parametric oscillator (OPO) and the acousto-optic programmable filters (AOPDF) are presented.

A 1μm CMOS eight-bit integrated circuit was designed and fabricated,used for sampling,weighting,controlling and summing of both SAW delay lines and SAW IDTs in multi-chip module (MCM) programmable SAW filter.

The method of designing the programmable filter used in signal measurement of electrophysiology is described.

This paper introduces programmable filter technology to traditional hardware for heat-rate detection, then the midfrequency of R wave filter becomes regulable resultingly, and thus a heart rate detection system can precisely position R waves and calculate heart rates of different animals.

The Research of Spectral Imaging Based on AOTF;

Due to its many advantages,such as miniaturization,high accuracy,high resolution,fast scanning speed,increased robustness and good stability,acousto-optic tunable filter (AOTF)-near infrared (NIR) spectrometer has been successfully applied in many fields.

A kind of speed sensor-less DTC method with a programmable low pass filter(LPF) to estimate stator flux was presented.