Near-diffraction-limited linearly polarized narrow-linewidth ...- random distributed feedback fibre laser level ,watt-level high power random distributed feedback Raman fiber laser at 1150 nm and its application in mid-infrared laser generation,” Opt. Express 23, 17138–17144 (2015). Random distributed feedback fiber lasers: Impact of third ...Chen and Y. Ding, Random distributed feedback fiber laser pumped by an ytterbium doped fiber laser, Optik, 125 (2014) 3663–3665. Crossref , ISI , ADS , Google Scholar 15.
We demonstrate a random distributed feedback fiber laser at 2.1 μm. A high-power pulsed Tm-doped fiber laser operating at 1.94 μm with a temporal duty ratio of 30% was employed as a pump laser to increase the equivalent incident pump power. A piece of 150 m highly GeO2-doped silica fiber that provides a strong Raman gain and random distributed feedbacks was used to act as the gain medium ...
Issues > 2010 > December 2010 > Lasers > Random Distributed Feedback Fiber Laser Random Distributed Feedback Fiber Laser Sergei K. Turitsyn, Sergey A. Babin, Atalla E. El-Taher, Paul Harper, Dmitriy V. Churkin, Sergey I. Kablukov, Juan Diego Ania-Castañón, Vassilis Karalekas and Evgenii V. Podivilov
Here, we demonstrate a fibre laser with a mirrorless open cavity that operates via Rayleigh scattering, amplified through the Raman effect. The fibre waveguide geometry provides transverse confinement and effectively one-dimensional random distributed feedback, leading to the generation of a stationary near-Gaussian beam with a narrow spectrum ...
We numerically study and compare the performance limitations imposed by accumulated noise and nonlinear phase difference in various configurations of amplified fiber optic gyroscopes in which amplification is provided by stimulated Raman scattering, with a focus on ultralong and random distributed feedback Raman fiber lasers.
THEORY OF A RANDOM FIBER LASER 1135 2. BASIC DYNAMIC EQUATIONS The random fiber laser is a piece of optical fiber of length L that is optically pumped from the fiber ends. As a result, randomly backscattered light in the fiber is amplified through the Raman effect, and the system starts to lase at some level of the amplification (see [1]).
For the random laser, the generated optical spectra are ∼ 35 dB above the noise level and are orders of magnitude narrower than the ASE spectrum (see inset in Fig. 4 b). In the transverse...
Random distributed feedback fiber laser Abstract: I will overview our recent results on ultra-long lasers and will discuss the concept of a fiber laser with an open cavity that operates using random distributed feedback provided by Rayleigh scattering amplified through the Raman effect.
The concept of random fiber laser has been widely studied [1, 10–12], which helps to build a connection between random lasing and the significant fiber waveguide structure. A random dis-tributed feedback fiber laser (RDFFL) is one simple and promising design of such a random laser. It operates via random distributed Rayleigh scattering ...
The concept of random lasers exploiting multiple scattering of photons in an amplifying disordered medium in order to generate coherent light without a traditional laser resonator has attracted a great deal of attention in recent years. This research area lies at the interface of the fundamental theory of disordered systems and laser science. The idea was originally proposed in the context of ...
Random distributed feedback fiber laser. Sergei K. Turitsyn 1. Institutions (1) 06 Mar 2011-Vol. 4, Iss: 4, pp 231-235. Abstract: I will overview our recent results ...
Here, spectral evolution in the random fibre laser is monitored in a continuous fashion over a time scale of 60 s, resulting in the acquisition of ∼ 10 4 individual spectra at an effective sampling...
The concept of random lasers making use of multiple scattering in amplifying disordered media to generate coherent light has attracted a great deal of attention in recent years. Here, we demonstrate a fibre laser with a mirrorless open cavity that operates via Rayleigh scattering, amplified through the Raman effect. The fibre waveguide geometry provides transverse confinement and effectively ...
A multiwavelength random fiber laser based on stimulated Brillouin scattering (SBS) with odd and even order Stokes output separated is proposed and demonstrated experimentally. The gain is provided by the SBS and erbium doped fiber amplifier, while the Rayleigh scattering in single mode fiber (SMF) provides random distributed feedback. With a two-branch structure, we successfully make the ...
A tunable erbium-doped fiber (EDF) laser based on random distributed feedback through backward Rayleigh scattering in a 20-km-long single-mode fiber and a tunable fiber Fabry-Perot interferometer filter is demonstrated. It has a broad wavelength tuning range up to 40 nm (from 1525 to 1565 nm) with a narrow linewidth of ~0.04 nm. Due to the half-opened laser cavity design and the efficient gain ...
High reflectivity (99%) FBG centred at 1455 nm with a 200 GHz bandwidth was deployed at the end of the transmission line to reflect Stokes-shifted light from the backward pump at 1366 nm and form a...
atively long (kilometer-level) passive fiber, and transient nano-second-level pulse duration demanding precise time steps. This ... in a random distributed feedback fibre laser,” Nat. Commun. 8 ...
This is the first demonstration of random distributed feedback fiber laser at 2 μm band based on Raman gain, and could be further improved by more pump power and optimized fiber length. We demonstrate a random distributed feedback fiber laser at 2.1 μm. A high-power pulsed Tm-doped fiber laser operating at 1.94 μm with a temporal duty ratio of 30% was employed as a pump laser to increase ...
The image pixel size was 3 µm, and the test results are shown in Figure 3, where the a-1, b-1, and c-1 panels of Figure 3 represent the 2D distribution of pores, and the a-2, b-2, and c-2 panels of Figure 3 show the 3D distribution of pores. When the laser power was 210 W, and the scanning speed was 1300 mm/s, shown in Figure 3a, there were ...
Random distributed feedback fibre laser Sergei K. Turitsyn1*,SergeyA.Babin2, Atalla E. El-Taher1, Paul Harper1,DmitriyV.Churkin2, Sergey I. Kablukov2, Juan Diego Ania-Castan˜o´n1,3, Vassilis Karalekas1 and Evgenii V. Podivilov2 The concept of random lasers making use of multiple scattering in amplifying disordered media to generate coherent ...
Such a random distributed feedback fibre laser has a number of interesting and attractive features. The fibre waveguide geometry provides transverse confinement, and effectively one-dimensional random distributed feedback leads to the generation of a stationary near-Gaussian beam with a narrow spectrum.
In the development of random lasers, significant effort has been expended to improve the directionality of the laser emission 7,9,12,16 and frequency selection 17,18,19, and the use of fiber configurations has resulted in a new level of control 9,10,20,21,22,23. However, efficient control of random laser emissions in the temporal regime has not ...
atively long (kilometer-level) passive fiber, and transient nano-second-level pulse duration demanding precise time steps. This ... in a random distributed feedback fibre laser,” Nat. Commun. 8 ...
Random distributed feedback fibre laser Authors. Keywords - Journal. Nature Photonics Volume 4, Issue 4, Pages 231-235 Publisher. Springer Nature ...
The concept of random fiber laser has been widely studied [1, 10–12], which helps to build a connection between random lasing and the significant fiber waveguide structure. A random dis-tributed feedback fiber laser (RDFFL) is one simple and promising design of such a random laser. It operates via random distributed Rayleigh scattering ...
