Nufern Articles and White Papers Feed

The potential of mid-infrared lasers for minimally invasive surgery

Tue, 06 Jan 2009 00:00:00 -0800

For many medical applications, the mid-infrared wavelength range of 1.9–2.1 µm has numerous advantages. It combines the tissue dissection advantages of CO2 lasers and the haemostasis properties of Nd:YAG lasers.

Latest Developments in 790nm-pumped Tm-doped Fiber Laser Systems for DIRCM Applications

Thu, 02 Oct 2008 00:00:00 -0800

Tm-fiber lasers operating CW at 1908 nm are an excellent pump source for Ho-YAG. Many groups are using this scheme to generate high pulse energies at 2.09 µm for <abbr title="Infrared Countermeasures">IRCM</abbr> applications.

Diode technology advances fiber-laser pumping

Mon, 22 Sep 2008 00:00:00 -0800

Improved power scaling of fiber lasers is being enabled by advances in high-brightness pump laser diodes and innovations in coupling the diode energy into the target delivery fiber.

Thulium-doped fiber lasers: the latest revolution in high-power fiber technology

Fri, 04 Jul 2008 00:00:00 -0800

With output power levels now approaching the kW level, Tm-doped fiber lasers are beginning to emerge as the latest revolution in high-power fiber laser technology. Operating at 1.9–2.1 µm, this technology falls into the <q>eye-safer</q> category of lasers, giving it potential advantages over 1 µm lasers for industrial and military directed energy applications. The greater potential for pulse scaling is also beginning to be realized with peak powers now approaching 100 kW without requiring excessively complicated fiber designs or sacrificing beam quality.

High-Power Large Mode Area Optical Fibers for Fiber Lasers and Amplifiers

Mon, 02 Jun 2008 00:00:00 -0800

Much of the recent improvement in high power fiber laser performance has been obtained by increasing the mode field area of the core guiding region beyond that found in standard telecom fiber designs. This simple scaling concept has delivered highly efficient kWatt level fiber lasers and amplifiers operating at 1μm, based on Yb-doping and more recently the extension to 2μm using highly efficient Tm-doped fibers.

Temperature-dependent spectroscopic properties of Tm3+ in germanate, silica, and phosphate ...

Mon, 05 May 2008 00:00:00 -0800

Spectroscopic properties of thulium-doped germanate, silica, and phosphate glasses were measured and compared since such glasses are of interest as materials for fiber lasers in the eye-safe wavelength region.

Power scaling 790nm-pumped Tm-doped devices from 1.91 to 2.13�m

Tue, 22 Jan 2008 00:00:00 -0800

We answer some common questions about 790nm-pumped Tm-doped fibers. What are the wavelength limitations? What about single polarization? What is the fiber reliability?

50W single-mode linearly polarized high peak power pulsed fiber laser with tunable ...

Tue, 22 Jan 2008 00:00:00 -0800

50W single-mode linearly polarized high peak power pulsed fiber laser with tunable ns–µs pulse durations and kHz–MHz repetition rates for a wide range of applications.

Diode pump requirements for high-power fiber lasers

Thu, 01 Nov 2007 00:00:00 -0800

We review some of the unique requirements associated with pumping high power fiber lasers in various architectures, the roadmap on power scaling and wavelength requirements for next generation eye-safe fiber lasers.

High-efficiency 100W level monolithic fiber devices operating at 2 �m

Thu, 21 Jun 2007 00:00:00 -0800

We present two examples of robust 2 µm monolithic fiber devices operating at ~100 W level, with higher E-O efficiency than contemporary systems and no evidence of thermal roll-over or instability.