Dynamic compensation of transient gain saturation in erbium-doped fiber amplifiers by pump feedback control

Motoshima, K.; Chen, D. N.; Leba, L.M.; Downs, M. M.; Li, T.; Desurvire, E.

doi:10.1364/ofc.1993.tui5

Cited by 2 publications

(3 citation statements)

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“…Other methods that offer ultrafast pulse-on-demand operation typically depend on some sort of gain control in the laser amplifiers. It is possible to directly modulate pump power [15], however, this method is often limited by the slow response times and in some cases must include advanced thermal management setups for pump wavelength stabilization [16]. A different approach uses additional idler light source which keeps the population inversion at constant level, between selected marker pulses, even in the case of continuous pumping of the amplifier [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Pulse-on-demand laser operation from nanosecond to femtosecond pulses and its application for high-speed processing

Petelin

Černe

Mur

et al. 2021

Advanced Optical Technologies

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In this manuscript we present a true pulse-on-demand laser design concept using two different approaches. First, we present a fiber master oscillator power amplifier (MOPA) based quasi-continuous wave (CW) laser, working at high modulation bandwidths, for generation of nanosecond pulses. Second, we present a hybrid chirped pulse amplification (CPA)-based laser, combining a chirped-pulse fiber amplifier and an additional solid-state amplifier, for generation of femtosecond pulses. The pulse-on-demand operation is achieved without an external optical modulator/shutter at high-average powers and flexible repetition rates up to 40 MHz, using two variants of the approach for near-constant gain in the amplifier chain. The idler and marker seed sources are combined in the amplifier stages and separated at the out using either wavelength-based separation or second harmonic generation (SHG)-generation-based separation. The nanosecond laser source is further applied to high throughput processing of thin film materials. The laser is combined with a resonant scanner, using the intrinsic pulse-on-demand operation to compensate the scanner’s sinusoidal movement. We applied the setup to processing of indium tin oxide (ITO) and metallic films on flexible substrates.

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Section: Introductionmentioning

confidence: 99%

Pulse-on-demand laser operation from nanosecond to femtosecond pulses and its application for high-speed processing

Petelin

Černe

Mur

et al. 2021

Advanced Optical Technologies

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“…However, at the same time, it is also well recognized that the cross-gain saturation effect in EDFA could result in harmful power transients and gain excursion to surviving channels in the network [1], [2]. For the suppression of these transient effects, various gain-clamping optical/electrical systems have been suggested [3]- [5]. In general, these circuits consist of three major components: a gain-deviation detector, an error signal processor (controller), and an actuator such as a pump injection current driver or signal laser sources.…”

Section: Introductionmentioning

confidence: 99%

“…In general, these circuits consist of three major components: a gain-deviation detector, an error signal processor (controller), and an actuator such as a pump injection current driver or signal laser sources. It is also common to classify these circuits depending on the type of actuator, for example, link control [3], all-optical feedback [4], and pump-control [5] systems.…”

Section: Introductionmentioning

confidence: 99%

Link-control gain clamping for a cascaded EDFAs link using differential ASE monitor

Yoon

Park

Ahn

et al. 2000

IEEE Photon. Technol. Lett.

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We propose a novel scheme for the suppression of gain excursion in a cascaded erbium-doped fiber amplifiers (EDFAs) link. By applying the differential amplified spontaneous emission monitoring method on link-control gain clamping, it is possible to achieve gain clamping for the whole link irrespectively of the control-signal wavelength and characteristics of individual amplifiers. The suggested algorithm/circuitry does not require predefinition of the injected signal power and operates independently of the wavelengths of control/data signals to the EDFA, enabling its application to different amplified links under distinct design parameters.

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Dynamic compensation of transient gain saturation in erbium-doped fiber amplifiers by pump feedback control

Cited by 2 publications

References 5 publications

Pulse-on-demand laser operation from nanosecond to femtosecond pulses and its application for high-speed processing

Pulse-on-demand laser operation from nanosecond to femtosecond pulses and its application for high-speed processing

Link-control gain clamping for a cascaded EDFAs link using differential ASE monitor

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