A topical review of numerical and experimental studies of supercontinuum generation in photonic crystal fiber is presented over the full range of experimentally reported parameters, from the femtosecond to the continuous-wave regime. Results from numerical simulations are used to discuss the temporal and spectral characteristics of the supercontinuum, and to interpret the physics of the underlying spectral broadening processes. Particular attention is given to the case of supercontinuum generation seeded by femtosecond pulses in the anomalous group velocity dispersion regime of photonic crystal fiber, where the processes of soliton fission, stimulated Raman scattering, and dispersive wave generation are reviewed in detail. The corresponding intensity and phase stability properties of the supercontinuum spectra generated under different conditions are also discussed.

Supercontinuum generation in photonic crystal fiber

This paper gives the 2010 self-consistent set of values of the basic constants and conversion factors of physics and chemistry recommended by the Committee on Data for Science and Technology (CODATA) for international use. The 2010 adjustment takes into account the data considered in the 2006 adjustment as well as the data that became available from 1 January 2007, after the closing date of that adjustment, until 31 December 2010, the closing date of the new adjustment. Further, it describes in detail the adjustment of the values of the constants, including the selection of the final set of input data based on the results of least-squares analyses. The 2010 set replaces the previously recommended 2006 CODATA set and may also be found on the World Wide Web at physics.nist.gov/constants.

/pdf/codata-recommended-values-of-the-fundamental-physical-4bsdant71c.pdf

CODATA Recommended Values of the Fundamental Physical Constants: 2006

The rise in output power from rare-earth-doped fiber sources over the past decade, via the use of cladding-pumped fiber architectures, has been dramatic, leading to a range of fiber-based devices with outstanding performance in terms of output power, beam quality, overall efficiency, and flexibility with regard to operating wavelength and radiation format. This success in the high-power arena is largely due to the fiber’s geometry, which provides considerable resilience to the effects of heat generation in the core, and facilitates efficient conversion from relatively low-brightness diode pump radiation to high-brightness laser output. In this paper we review the current state of the art in terms of continuous-wave and pulsed performance of ytterbium-doped fiber lasers, the current fiber gain medium of choice, and by far the most developed in terms of high-power performance. We then review the current status and challenges of extending the technology to other rare-earth dopants and associated wavelengths of operation. Throughout we identify the key factors currently limiting fiber laser performance in different operating regimes—in particular thermal management, optical nonlinearity, and damage. Finally, we speculate as to the likely developments in pump laser technology, fiber design and fabrication, architectural approaches, and functionality that lie ahead in the coming decade and the implications they have on fiber laser performance and industrial/scientific adoption.

High power fiber lasers: current status and future perspectives [Invited]

The history, fabrication, theory, numerical modeling, optical properties, guidance mechanisms, and applications of photonic-crystal fibers are reviewed

Photonic-Crystal Fibers

A review on the latest developments on graphene, written from the perspective of a chemist, is presented. The role of chemistry in bringing graphene research to the next level is discussed.

The chemistry of graphene

https://iopscience.iop.org/article/10.1070/QEL16861/pdf

Problems of development of tunable hybrid bismuth - erbium fibrelasers

Excitation-emission properties of Bi:SiO 2 optical fibers (without other dopants) were investigated in the wavelength region 400–1600nm. Laser generation in fibers of such composition was demonstrated for the first time (lasing at 1460nm, pump at 1340nm).

Bi:SiO 2 optical fibers - a possible way to understand the nature of Bi-related emitting centers

We report on an all-silica singlemode, ultra-broad-core bandgap fiber consisting of a depressed-index-core surrounded by cylindrical dielectric mirror. The mode area reaches 530 /spl mu/m/sup 2/ at 0.866-/spl mu/m-wavelength with propagation loss equal to 0.27 dB/m.

Depressed-index-core singlemode bandgap fiber

Q-switched fiber lasers have found a number of applications such as medical treatment, micromachining, diagnostics and others. Some of them require an emission at wavelengths which are not coincide with the optical transmissions of the rare-earth elements. Then, an investigation of Raman pulsed source seems to be interesting. Recently, a new type of optical fiber, namely, Bi-doped fiber was suggested. One of the applications of this fiber is the saturable absorber for Yb-doped fiber laser to get Q-switched regime. That allows one to build the all-fiber Raman source.

All-fiber pulsed Raman source pumped by Yb:Bi fiber laser

We report a photonic bandgap fibre exhibiting a large solid core (diameter of 34 ?m) combined with a very high negative chromatic dispersion coefficient (-1480 ps/(nm. km)).

E. M. Dianov

Papers

Problems of development of tunable hybrid bismuth - erbium fibrelasers

Bi:SiO 2 optical fibers - a possible way to understand the nature of Bi-related emitting centers

Depressed-index-core singlemode bandgap fiber

All-fiber pulsed Raman source pumped by Yb:Bi fiber laser

Dispersion Compensating Photonic Bandgap Fibre