Giant Brillouin Amplification in Gases

Abstract

The low-loss properties of hollow-core fibers all result from a much lower interaction between photons and dense fiber material. This dramatically reduces losses, but also significantly reduces the possibilities for direct optical amplification. This year, our team offered an efficient solution to this quandary.

Review of Specialty Fiber Based Brillouin Optical Time Domain Analysis Technology

“…The Brillouin gain coefficients of a chalcogenide glass microstructured single mode fiber (SMF) was 100 times larger than fused silica [17]. More recently, a gas-filled hollow-core PCF has demonstrated highly nonlinear Brillouin gain, which scales with the square of the gas pressure and achieved a strain-free high performance distributed temperature sensing [18,19]. On the contrary, solid core PCFs have demonstrated reduced Brillouin gain and a three-fold increase of the Brillouin threshold power with a uniform all-silica fiber.…”