Fabrication and amplification of Rhodamine B‐doped step‐index polymer optical fiber

Abstract

A step-index polymer optical fiber (SI POF) containing Rhodamine B in poly(methyl methacrylate) (PMMA) has been fabricated by a preform technique. Fluorescence of different fiber lengths were observed and discussed. A high gain (23 dB) for a SI POF with 60-cm length, 400-m diameter was obtained. The Rhodamine B content of the doped SI POF is 5 ppm-wt. The signal wavelength providing the highest gain for a 60 cm SI POF is around 630 nm, and the optimum fiber length is about 60 cm at 10 kW launched pump power.

Polymer-Optical-Fiber Lasers and Amplifiers Doped with Organic Dyes

“…In addition, they constitute a promising research field as active devices, in combination with organic dopants (either organic dyes or organic semiconductors). The aim is to achieve efficient fiber lasers and amplifiers, and even optical-gain switches [2][3][4][5][6], in short fiber distances. High-gain amplifiers have been reported in distances shorter than 1 m, due to the high emission and absorption cross sections of organic dopants.…”

“…Optical amplification in dye-doped POFs was reported for the first time in 1993, for the case of a graded-index (GI) fiber doped with RB [7]. More recently, a preform technique was presented and used to fabricate RB-doped step-index (SI) POFs [6]. The optical feedback for the gain medium in active POFs is usually provided by the cylindrical surface of the optical fiber, which acts as a cavity.…”

Fabrication and characterization of dye-doped polymer optical fiber as a light amplifier

“…[10][11][12][13][14][15] The range of tun· ability of laser dyes such as Rhodamine B and Ri» damine 6G usually lies between 570 and 640 nm. Tbe advantage of incorporating laser dyes in solid matrices such as POF is that it is easier and safer to handle them than when they are in liquid form.…”

Humidity insensitive step-index polymer optical fibre Bragg grating sensors

“…The most common technique that have been used in the past to fabricate SIPOFs is by doping the core of a PMMA fibre with different active materials such as trans-4-stilbenemethanol, Rhodamine B, benzil dimethyl ketal(BDK), etc. for FBG sensors or broad band amplification applications [10][11][12] . SIPOFs that are made of PMMA have low operating temperature and affinity for water, which make them sensitive to humidity 13 .…”