Browsing by Author "Dülgergil, E."
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Item Open Access 10 W, 10 ns, 50 kHz all-fiber laser at 1.55 µm(Optical Society of America, 2012) Pavlov, Ihor; Dülgergil, E.; İlbey, Emrah; İlday, Fatih ÖmerWe report on an all-fiber, singlemode MOPA system at 1.55 µm producing 10-ns, 200-µJ pulses with 20 kW of peak power and utilize it to micromachine crystalline Si, which is largely transparent at this wavelength.Item Open Access Nonlinear chirped-pulse amplification of a soliton-similariton laser to ~1 µJ at 1550 nm(Optical Society of America, 2012) İlbey, Emrah; Pavlov, Ihor; Dülgergil, E.; Öktem, Bülent; Yavas, Seydi; Rybak, Andrii; Zhang, Zuxing; İlday, Fatih ÖmerWe demonstrate all-fiber-integrated nonlinear CPA system operating at 1550 nm, seeded by a soliton-similariton laser. Chirped 2-μJ pulses are compressed to 700-fs, 0.5-μJ pulses at 1 MHz. Amplifier output is through a strictly singlemode fiber. © 2012 OSA.Item Open Access Time-and position-dependent modeling of high-power low-repetition-rate Er-Yb-fiber amplifier(IEEE, 2013) Pavlov, Ihor; Dülgergil, E.; Elahi, Parviz; İlday, F. ÖmerThere is rapid progress in the development of high-power fiber lasers due to their robust operation, low cost, high beam quality at high powers. There are various applications, such as laser sensing, LIDAR applications, processing of specific materials, which require robust and high-power pulsed laser sources at 1550 nm with high beam quality. Achievement of high peak power with low repetition rate is challenging due to well-known problems of strong nonlinear effects and amplified spontaneous emission (ASE) build-up between pulses. In order to reach highest efficiency, the design of each stage of amplification should be carefully optimized. Numerical modeling can be a great tool due to the large number of parameters involved [1]. To date, most modeling efforts of fiber amplification have assumed either a lumped gain model for pulse propagation or a distributed, position-dependent gain model for CW signal for computational simplicity. Here, we investigate both time- and position-dependent gain dynamics numerically, which are used to optimize experimental results. © 2013 IEEE.