High-power narrow-linewidth C-band erbium-doped optical fiber amplifier employing 1064 pumping source

Abstract

The invention relate to a high-power narrow-linewidth C-band erbium-doped optical fiber amplifier employing a 1064 pumping source. The amplifier includes a signal source, the 1064 pumping source, an Er-doped fiber and a coupling system. Signal light sent by the signal source and pumping light sent by the 1064 pumping source are coupled to the Er-doped fiber through the coupling system and the signal light is amplified and then output. According to the invention, 1064 nm pumping light is adopted for pumping of the Er-doped fiber, so that the light conversion efficiency is high, the power consumption is low, and a drive and a control circuit are simple.

Description

technical field [0001] The invention relates to the technical field of optical fiber amplifiers, in particular to a 1064-pumped high-power narrow-linewidth C-band erbium-doped optical fiber amplifier. Background technique [0002] Optical fiber amplifiers are generally composed of a signal source, a pump source, a gain medium fiber, an optical isolator and a coupling system. Signal light and pump light are coupled in the gain medium fiber to obtain amplified signal light output. The gain medium fiber in the erbium-doped fiber amplifier is erbium-doped fiber, and its amplification principle is: when there is no pump light, the energy state of erbium ions is called the ground state; after absorbing the pump light energy, the erbium ions are in a higher energy state , that is, the transition from the ground state to the excited state; because the lifetime of the erbium ion in this high-energy excited state is very short, it will quickly transition to a lower excited state, whic...

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Problems solved by technology

[0003] An important issue in erbium-doped fiber amplifier is to select a suitable pump source. At present, the conventional erbium-doped fiber amplifier uses a 980nm single-mode pump laser as the pump source. The pumping wavelength of erbium-doped fiber is 980nm, and its pump-signal The conversion efficiency is low, only 30%, and the pump power required to achieve 1W signal output is very large

In addition, the 980nm single-mode pump laser has low electro-optic efficiency, high cost, and high requirements on the stability of the die temperature, which requires refrigeration and temperature control, high power consumption, and complex drive and control circuits.

The temperature deviation has a great influence on the pump output wavelength, which in turn affects the optical index of the amplifier

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