Grating-free nth order cascaded Raman fibre lasers using highly Ge-doped low loss fibre.
نویسندگان
چکیده
Pumped by a narrow band Nd(3+)-doped fibre laser, a grating-free three-wavelength Raman fibre laser has been demonstrated. More than 1.3W output power at the third Stokes line of 1230 nm, a bandwidth of 1.8nm and a slope efficiency of ~28% was measured. A four-wavelength Raman fibre laser was also demonstrated using a different resonator that consisted of a 4% fibre end reflector, a dielectric mirror and a single fibre Bragg grating. This method is simple, versatile and cheap compared with conventional methods employing fibre Bragg gratings used to resonate all Stokes wavelengths.
منابع مشابه
Thulium Doped Fibre Laser based on Theta Cavity Lasing Direction Rectification
The development of thulium-doped fibre lasers (TDFL) is motivated by numerous potential applications in spectroscopy, remote sensing, medicine, material processing, and telecommunications. The all-fibre corepumped ring cavity TDFLs exploiting fiberized grating-based filter [1] or Fabry-Pérot etalon [2] as a wavelength selective element were reported. An optical isolator should be inserted into ...
متن کاملEfficient Single Frequency Fibre Lasers Using Novel Photosensitive ErYYb Optical Fibres
Boron and germanium doped highly photosensitive cladding is used in a novel design to achieve photosensitive Er/Yb doped fibres, enabling short strong gratings (length = 1 cm, reflectivity > 99%) to be written without hydrogenation. The high absorption at 980 nm in Er/Yb fibres allows efficient pump absorption over a short device length, ideal for achieving highly efficient single frequency fib...
متن کاملRayleigh scatter based order of magnitude increase in distributed temperature and strain sensing by simple UV exposure of optical fibre
We present a technique to improve signal strength, and therefore sensitivity in distributed temperature and strain sensing (DTSS) using Frequency domain Rayleigh scatter. A simple UV exposure of a hydrogen loaded standard SMF-28 fibre core is shown to enhance the Rayleigh back-scattered light dramatically by ten-fold, independent of the presence of a Bragg grating, and is therefore created by t...
متن کاملRotationally Variant Grating Writing in Photonic Crystal Fibres
The role of rotational alignment during grating writing is comprehensively examined by the measurement of core luminescence from a Ge-doped 12 ring photonic crystal fibre, computer simulation of transmission and, definitively, by inscription of gratings at three angles– 0°, 30° and the optimum luminescent angle for this fibre, 21.5°. All experimental results were in accordance with each other a...
متن کاملRaman Spectra of a PMMA Microstructured Optical Fibre and Direct Measurement of Its Gain Coefficient
A polymethylmethacrylate (PMMA) microstructured polymer optical fiber (mPOF) is fabricated and characterized. Using the cut-back technique the fiber loss is measured which is higher than the step-index silica fibers. Through a novel experimental scheme, the backward Stokes spectrum of the fabricated mPOF is recorded over a range exceeding 3000 cm‑1 during the cut-back method and compared ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Optics express
دوره 12 17 شماره
صفحات -
تاریخ انتشار 2004