Distributed Acoustic Sensing (DAS) has become a popular method of observing seismic wavefields: backscattered pulses light reveal strains or strain rates at any location along fiber-optic cable. In contrast, few newer systems transmit through cable and collect integrated phase delays over the entire cable, such as Microwave Frequency Fiber Interferometer (MFFI). These can be deployed significan...

Photonic integrated circuits (PICs) allow for the rapid advancement of a wide range optical devices on compact platform, making them more useful and readily available in commercial market. Various materials such as III–V semiconductors, silicon, silicon nitride, lithium niobate, polymers are used to create PICs with certain unique properties. Hybrid integration can combine multiple material pla...

The experimental details of KrF laser “oscillator – amplifier” configuration used in UCSD mirror damage facility are given. Two commercial KrF lasers are used for running oscillator-amplifier mode of operation. The pulses from Compex KrF excimer laser is sliced using a Pockels cell to FWHM 5ns and passed through the LPX excimer cavity for amplification. The experimental details, gain analysis a...

Surface charges accumulated on solid insulating materials in electrical apparatuses and electronic devices could distort the initial electric field severely damage insulation performance. Accurate transient surface charge measurement is critical to determine mechanisms of transport flashover occurrence, estimate strength under high voltage. The technique based Pockels electro-optic effect consi...

We report the performance of a periodically poled lithium niobate (PPLN) crystal inside a diode-pumped Nd:YVO4 laser for simultaneous laser Q switching and optical parametric oscillation. The monolithic PPLN crystal consists of two sections, a 1-cm-long 14-microm-period electrode-coated section and a 4-cm-long 30-microm-period section, functioning as a low-voltage Pockels cell and a quasi-phase...