We present a mode-locked Yb:Lu2O3 laser with up to 67% of optical-to-optical efficiency. By utilizing a high brightness optically pumped semiconductor laser (OPSL) as a pump source and using a semiconductor saturable absorber mirror (SESAM) we obtained self-starting mode locking. A pulse duration of 571 fs at 4.73 W of average output power with an optical-to-optical efficiency of 67% was achiev...

In this paper, a new modified digital pulse interval modulation called Dual Amplitude-Width Pulse Interval Modulation (DAWPIM) is presented, on the basis of Pulse Amplitude Modulation (PAM) and Pulse Width Modulation (PWM), and its properties are presented. After introducing symbol structure, data rate improvement, average normalized power requirement and bandwidth efficiency are studied. The p...

Based on the modified Kogelnik diffraction efficiency equation, we study the diffraction intensity spectrum and the total diffraction efficiency of reflection volume holographic gratings in photorefractive media. Taking photorefractive LiNbO3 crystal as an example, the effect of the grating parameters and the pulse width on the diffraction properties is presented under the influence of crystal ...

In underwater wireless optical communication links, pulse position modulation (PPM) and differential pulse position modulation (DPPM) are two typical modulation schemes. In this paper, we present an alternative modulation scheme to improve the communication performance compared with the traditional methods. As an improvement of DPPM, this new modulation scheme, which named as polarization diffe...

The electromagnetic coupling effect on the irregular cavity which is acted by ultra wide band electromagnetic pulse (UWB-EMP) is studied. First, an irregular cavity structure model is established by using electromagnetic numerical calculation software (CST). Second, based on the model, the influences of UWB-EMP on the irregular cavity coupling efficiency are analyzed, when its rise time and pul...

This study will focus on how the different characteristics of the applied pulse, including voltage, pulse length, frequency and multiple pulsing affect transformation efficiency of Top10 E-coli cells. It will be shown that transformation efficiency will be maximal at optimum settings different from that suggested by electroporator manufacturer. Experimental results will also verify pore formati...

Ž . The interaction of high-intensity short pulse fs lasers with atomic or molecular vapors permits the conversion of visible light to intense coherent radiation in the vacuum ultraviolet spectral region. We demonstrate sum frequency mixing of a Ž . Ž . high-intensity short pulse fs laser with a conventional long pulse ns laser to extend the accessible wavelength range of harmonic generation. T...