Raman amplification in plasma has been proposed to be a promising method of amplifying short radiation pulses. Here, we investigate chirped pulse Raman amplification (CPRA) where the pump pulse is chirped and leads to spatiotemporal distributed gain, which exhibits superradiant scaling in the linear regime, usually associated with the nonlinear pump depletion and Compton amplification regimes. ...

This paper presents a low noise CMOS image sensor using column-parallel high-gain signal readout and digital correlated multiple sampling (CMS). The sensor used is a conventional 4T active pixel architecture with a pinned-photodiode as detector. The test sensor has been fabricated in a 0.18μm CMOS image sensor process from TSMC. The random noise from the pixel readout chain is reduced in two st...

Presented is a 0.9 V rail-to-rail constant gm CMOS amplifier input stage consisting of complementary differential pairs and a gm control circuit. The gm control circuit eliminates the gm dead zone, which occurs in the conventional rail-to-rail amplifier with ultra-low supply voltages. The proposed amplifier input stage has a constant gm that varies by +2.3% for rail-to-rail input common-mode le...

A hybrid chirped pulse amplification system composed by the monolithic fiber pre-amplifier and a two-stage single-pass single crystal amplifier was demonstrated. maximum power of 68 W at repetition rate 100 kHz obtained. The laser pulses were amplified then compressed using 1600 line/mm grating pair compressor. short duration 358 fs 54 obtained kHz, corresponding to peak 1.508 GW, best our know...

In this letter, a new rail-to-rail two-stage regenerative comparator for low supply voltage applications is presented. A operation achieved by utilizing an inverse inverter pre-amplifier. The proposed post-layout simulated within standard 180-nm CMOS technology. the worst-case scenario, energy efficiency and delay of are improved more than 80% compared to conventional single-stage comparator.

This paper presents the design of Sharpened three stage CIC filter for decimation. The proposed decimation filter has Cascaded-Integrator Comb filter as first stage, Sharpened Cascaded-Integrator Comb filter as second and third stage. The CIC filter at first stage operates at input sampling rate, sharpened second stage operates at lower rate as compared to first stage and sharpened third stage ...

We report on a high power, wavelength-agile, hybrid fiber-bulk laser, emitting up to 3.5 mJ 15 ns pulses at 1030 nm 5 kHz repetition rate. This laser is composed of commercial seed single-frequency fiber tunable over several GHz, amplified in dual-stage single-mode Ytterbium doped amplifier, followed by two Yb:YAG solid crystal amplifiers. To illustrate the potential such an architecture for fu...

We theoretically and experimentally compare the performance of two fully tunable phase shifter structures based on semiconductor optical amplifiers (SOA) by means of several figures of merit common to microwave photonic systems. A single SOA stage followed by a tailored notch filter is compared with a cascaded implementation comprising three SOA-based phase shifter stages. Attention is focused ...

In this paper, we analyze a distributed amplifier based on input/output attenuation compensation. The analysis is carried out for a HEMT transistor; and a constant-k section filter is used to calculate the amplifier’s characteristics such as attenuation factor, phase constant and gain. The proposed design approach enables us to examine the tradeoff among the variables, which include the type an...