LiF: F(2)- as a high repetition rate Ng: YAG laser passive modulator.
30-pps 30-mJ 10-ns FWHM pulses have been obtained in Nd:YAG laser systems with LiF crystal containing F(2)- color centers as the passive Q-Switch modulator. The saturation level of F(2)- color centers in the host crystal and the annealing phenomena of LiF: F(2)-(2) crystal were investigated. These observations make this room temperature stable color center crystal superb as a high power, high repetition rate neodymium laser passive modulator.
Efficient passive switches for neodymium lasers made of LiF:F2− crystals
Passive Q switches were made of LiF crystals with F2− color centers. These switches were characterized by a 14- to 18-fold contrast between the optical densities in the initial and bleached states, and they had a high initial absorption coefficient of 0.6 cm−1. The characteristics of one-, two-, and multipulse emission regimes were obtained for a YAG:Nd3+ laser (λ = 1.064μ) when LiF:F2− switches with different initial transmissions were used. The efficiency in the Q-switching regime depended on the switch transmission and amounted to 50-70% of the efficiency under free-oscillation conditions producing pulses with a peak output power up to 4 MW. The Q-switched radiation pulses were of 25 nsec duration and were characterized by both a high amplitude and a high time stability.
Testing digital circuits using a Mixed-Signal Automatic Test Equipment
This paper presents the results of parametric testing of digital ICs using a dedicated Mixed Signal Automatic Testing Equipment. Due to the prohibitive price of the ATE equipment and dedicated Device Interface Board (DIB) for digital Integrated Circuits (ICs), a DIB for analog circuits was used to perform the testing. Despite the challenges presented by the experiments, the results prove to be accurate for the performed tests, according to the data sheet of the digital ICs and production test data provided by the manufacturer.