Dual-band erbium ytterbium doped optical fiber pulse amplifier

A dual-band, pulsed technology, applied in lasers, laser components, optics, etc., can solve problems such as Yb-band self-pulsation, permanent damage, and reduced conversion efficiency

Active Publication Date: 2015-05-20
TIANJIN UNIV
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  • Application Information

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Problems solved by technology

On the one hand, this reduces the conversion efficiency of the pump power to the signal in the Er band (1500-1600nm), on the other hand, it also produces parasitic oscillations or even self-pulsation in the Yb band, which greatly reduces the performance of the amplifier and even causes permanent damage.

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  • Dual-band erbium ytterbium doped optical fiber pulse amplifier

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Embodiment Construction

[0017] The invention utilizes the bottleneck effect in the EYDFA under high-power pumping, adopts the pulse pumping method, and invents a pump pulse through reasonable design of the peak power, pulse length, and time delay between the pump pulse and the signal pulse. A fiber amplifier that can amplify pulse signals in two bands of 1.06μm and 1.55μm.

[0018] The technical scheme adopted in the present invention is:

[0019] An optical fiber amplifier that can amplify pulse signals in two bands of 1.06 μm and 1.55 μm. The system is composed of: a pump source, a pulse driving power supply for the pump source, a 1.06 μm band signal source, a 1.55 μm band signal source, and a signal source Pulse drive power supply, delay control circuit, isolator, 1064 / 1550WDM, pump / signal combiner, gain fiber, fiber end cap. The pump driving power source sends out a square wave current signal with a certain pulse width and amplitude according to a certain repetition frequency to drive the pump s...

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Abstract

The invention relates to the field of fiber lasers and provides an optical fiber pulse amplifier which can be used for amplifying pulse signals of two bands. The technical scheme includes that a dual-band erbium ytterbium doped fiber optic pulse amplifier comprises a pumping source, a pumping-source pulse driving power source, two different band signal sources, signal source pulse driving power sources, a time-delay control circuit, isolators, a wavelength division multiplexer, a pumping / signal combiner, gain fiber and a fiber end cap. The pumping-source pulse driving power source is used for driving the pumping source to send out laser pumping pulses which are injected into the gain fiber to pump the same via the pumping / signal combiner; synchronizing signals sent out by the pumping-source pulse driving power source are properly delayed through the time-delay control circuit to trigger two signal source pulse driving power sources to drive the two different band signal sources to send out signal pulses respectively; and two signal pulses pass the respective isolators and are coupled together to perform amplifying output via the wavelength division multiplexer. The optical fiber pulse amplifier is mainly applicable to amplification of the dual-band pulse signals.

Description

technical field [0001] The invention relates to the field of fiber lasers, in particular to a fiber amplifier capable of amplifying pulse signals in two wavebands of 1.06 μm and 1.55 μm. Specifically, the present invention relates to a dual-band Erbium-Ytterbium co-doped fiber pulse amplifier (EYDFA) that uses a pulse pumping method to effectively amplify a dual-band signal. technical background [0002] In order to obtain high-power laser output while maintaining good beam quality, high-power fiber lasers usually use a main oscillator + power amplifier structure. The seed light with good beam quality but low power is generated by the main oscillator, and then sent to the power amplifier to increase the laser output power. Obviously, the performance of the power amplifier has a decisive effect on the performance of the entire laser system. In the 1.55μm band, the power amplifier stage is usually an EYDFA using double-clad erbium-ytterbium co-doped fiber as the gain medium....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/0941H01S3/063G02F1/39
Inventor 韩群吕晓英陈耀飞刘铁根
Owner TIANJIN UNIV
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