Large-mode-area Er-doped fiber chirped-pulse amplification system for high-energy sub-picosecond pulses at 1.55 μm

Yılmaz, Tolga; Vaissie, Laurent; Akbulut, Mehmetcan; Gaudiosi, David M.; Collura, Lowell; Booth, Timothy; Jasapara, J.; Andrejco, Matthew J.; Yablon, A.D.; Headley, C.; DiGiovanni, D. J.

doi:10.1117/12.764511

Cited by 15 publications

(6 citation statements)

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“…A parallel development has seen the use of specially designed fibers and in-band pumping to reduce the effective nonlinearity by orders of magnitude, and as a result, considerably higher pulse energies have been achieved, albeit at the expense of much more complicated setups. In [15], an Er-fiber laser system operating at 50 kHz and generating 25 J pulse energies and a pulse duration of 800 fs was demonstrated. At the high end of the energy scale, a fiber laser system generating 636fs pulses with pulse energy of 100 J was reported [16] and a similar system reporting sub-500 fs pulses with 913 J pulse energy and average output power of 4.4 W was presented in [17].…”

Section: Introductionmentioning

confidence: 99%

Generation of 2- $$\mu$$ μ J 410-fs pulses from a single-mode chirped-pulse fiber laser operating at 1550 nm

et al. 2018

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We report on a simple, robust, femtosecond chirped-pulse-amplification system, based on Er-and Er-Yb-doped fibers, operating at a central wavelength of 1555 nm. The entire system is constructed from commercially available fiber components, except the grating compressor, for easy duplication by other researchers. The laser system produces chirped pulses with up to 4 J of pulse energy at 250 kHz. After dechirping, the pulse duration is 410 fs and the pulse energy is reduced to 2 J . The repetition rate of the laser is electronically tunable between 125 kHz and 60 MHz, limited by strong amplified spontaneous emission (ASE) generation at the low end. The amplifier system is almost completely fiber integrated, except for the pump delivery into the final amplifier stage, which is free-space backward-pumped to reduce undesired nonlinear effects, and the compressor which was designed using the gratings. The laser is practically free of misalignment and has exhibited excellent long-term stability during its use in various experiments for more than 600 working hours.

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Section: Introductionmentioning

confidence: 99%

Generation of 2- $$\mu$$ μ J 410-fs pulses from a single-mode chirped-pulse fiber laser operating at 1550 nm

et al. 2018

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“…Up to 50 W of pump power can be launched into the core of the gain fiber using proprietary mode matching components and specialty splicing. The in-band core pumping enables us to utilize the smaller quantum defect and maximum pump/signal overlap to achieve more efficient amplification [13,14]. This is again where the high gain per unit length specialty-fiber technology shines.…”

Section: Methodsmentioning

confidence: 99%

An Eye-Safe, SBS-Free Coherent Fiber Laser LIDAR Transmitter with Millijoule Energy and High Average Power

et al. 2021

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We report on an eye-safe, transform-limited, millijoule energy, and high average power fiber laser. The high gain and short length of the NP phosphate-glass fibers enable the SBS-free operation with kW level peak power. The output energy is up to 1.3 mJ, and the average power is up to 23 W at an 18 kHz repetition rate with 600 ns pulses (peak power > 2.1 kW). The PER is ≈16 dB and the M2 of the beam is 1.33 × 1.18. The coherent LIDAR Figure Of Merit (FOM) is 174 mJ*sqrt(Hz), which to our knowledge is the highest reported for a fiber laser. We also report 0.75 mJ energy and >3.7 kW peak power with down to 200 ns pulses and up to 1.21 mJ energy with a 3–5 kHz repetition rate operation of the current system.

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“…Historically, a ceiling on erbium doping concentration at about 4.0 × 10 25 ions/m 3 in silica glass LMA fibers has been imposed by strong ion clustering effects, where the close spatial proximity of erbium ions leads to cooperative energy coupling into transitions that are parasitic to the laser transition efficiency [13,14,41]. Owing to these ion-ion interactions at high erbium concentration, the upper laser level ( 4 I 13/2 ) lifetime decreases when pump power is increased, further degrading amplifier efficiency [42,43].…”

Section: Hem Fiber Amplifiers For High Energy Cpa Systemsmentioning

confidence: 99%

“…The continuing symbiotic advancement of optical fibers (where a smaller doped core is surrounded by a larger mode-confining cladding) and highly efficient pump sources, such as high brightness, fiber coupled laser diodes [6] and high power Raman fiber lasers [7], continues to trigger both research and commercialization of high power fiber lasers [8][9][10][11][12]. Meanwhile, monolithic fiber-optic femtosecond fiber laser systems now offer pulse energy up to 100 microjoules (µJ) using the CPA scheme with large mode area (LMA) erbium-doped (Er-doped) fiber amplifiers with A eff up to 1060 µm 2 [13,14].…”

Section: Introductionmentioning

confidence: 99%

High efficiency, monolithic fiber chirped pulse amplification system for high energy femtosecond pulse generation

Peng¹,

Kim²,

Mielke³

et al. 2013

Opt. Express

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A novel monolithic fiber-optic chirped pulse amplification (CPA) system for high energy, femtosecond pulse generation is proposed and experimentally demonstrated. By employing a high gain amplifier comprising merely 20 cm of high efficiency media (HEM) gain fiber, an optimal balance of output pulse energy, optical efficiency, and B-integral is achieved. The HEM amplifier is fabricated from erbium-doped phosphate glass fiber and yields gain of 1.443 dB/cm with slope efficiency >45%. We experimentally demonstrate near diffraction-limited beam quality and near transform-limited femtosecond pulse quality at 1.55 µm wavelength. With pulse energy >100 µJ and pulse duration of 636 fs (FWHM), the peak power is estimated to be ~160 MW. NAVAIR Public Release Distribution Statement A-"Approved for Public release; distribution is unlimited".

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Large-mode-area Er-doped fiber chirped-pulse amplification system for high-energy sub-picosecond pulses at 1.55 μm

Cited by 15 publications

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Generation of 2- $$\mu$$ μ J 410-fs pulses from a single-mode chirped-pulse fiber laser operating at 1550 nm

Generation of 2- $$\mu$$ μ J 410-fs pulses from a single-mode chirped-pulse fiber laser operating at 1550 nm

An Eye-Safe, SBS-Free Coherent Fiber Laser LIDAR Transmitter with Millijoule Energy and High Average Power

High efficiency, monolithic fiber chirped pulse amplification system for high energy femtosecond pulse generation

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