Gamma-ray induced pulsewidth broadening and powerloss in modelockedEr-doped fibre laser

Simultaneous measurement of radiation dose and strain based on an erbium-doped fiber ring laser incorporating a fiber Bragg grating

“…Polymethyl methacrylate (PMMA) optical fibers also have sufficient radiation sensitivity (0.4 dB/km·Gy at 530 nm) and low cost [4]. The erbium-doped fiber (EDF) have been exploited to be the important component to realize the optical absorption dosimeters because the EDF has many advantages, such as high sensitivity to radiation and an ability to provide signal amplification at 1550 nm where silica fibers have the lowest transmission loss [6,7]. Most of radiation tests using the EDF have been carried out for the reliability of the optical communication systems in space environments.…”

“…It has been reported that the transmission loss and the gain of the EDF are changed by gamma-ray radiation [6]. The effects of radiation on the performance of an EDF mode-locked laser in optical communication systems were investigated [7]. However, the research on a high-dose radiation sensing scheme based on the EDF-based fiber laser has not been investigated yet.…”

“…The RIA is primarily caused by gamma-ray ionization resulting in the induced color centers in the EDF. Since the production of color centers absorbs the pump light and the amplified spontaneous emission (ASE) resulting in the reduction of both the small-signal gain and the output power [6,7]. Therefore, the real-time information regarding the irradiation dose can be obtained by monitoring the variation of the output power of the EDF ring laser.…”