Glass, laser action

In glass, laser action has been observed only from trivalent lanthanides (24, 25). Hosts include oxide glasses... 

Laser action can be induced in Nd ions embedded in a suitable solid matrix. Several matrices, including some special glasses, are suitable but one of the most frequently used is yttrium aluminium garnet (Y3AI5O12), which is referred to as YAG. 

Gandy and Ginther (132) studied simultaneous laser action of neodymium and ytterbium ions in glass. The base glass was LiMgAlSi03. When singly... 

Lempicki and Samelson (160) in their first paper reporting laser oscillation in europium made use of europium benzoylacetonate (EuB3) dissolved in a mixture of ethyl and methyl alcohol. The ratio was 3 to 1 and the concentration of EuB3 was 5.2 x 1018 molecules/cm3. These solutions can be frozen into a glass uniformly at temperatures between —120° and — 170°C. In this range they report a fluorescent lifetime of about 5 x 10-4 sec. Additional information on laser action, fluorescent lifetimes, and spectral studies in chelates may be found in Ref. (138). 

The laser action of a glass or crystal depends on the laser peak cross-section and the threshold power for lasing. The peak cross-section a is given by [116]... 

The 4Ii3/2 - 4Iis/2 infrared emission band of Er3+ ions in fluorozirconate glass is displayed in Fig. 11. The band maximum is located at 1.53 /an and the width at half-maximum is as broad as 60 nm, which favors the use of this transition for optical amplification in the third telecommunication window. In bulk geometry, 1.6 jtm CW-laser action is reported for a Cr, Yb, Er-codoped fluoroaluminate glass slab pumped by a krypton laser [114],... 

The spectroscopy and laser action of rhodamine 6G in doped aluminosilicate glass (xerogels) shows that dyes can be very stable under these conditions . 

Commercial powders of reagent grade were mixed and melted in a platinum crucible for 1 h in an electric furnace at 1400°C. The melt was poured between two iron plates and the thickness of the obtained sample was 1.6 mm. The glass ceramic was obtained by thermal treatment of the precursor glass at 620°C for 2 hours. It was used to compare with measurements in the locally damage zone by laser action. 

Heumann E, Ledig M, Ehrt D, Seeber W, Duczynski EW, Vanderheide HI et al (1988) CW laser action of Er " in double sensitized fluoroaluminate glass at room-temperature. Appl Phys Lett 52 255-256... 

Eu3+ or i>Jd3+ were proposed whereby laser action of Eu3+ and Nd3+ in glass would be achieved. 

To obtain generations in the regions of mode-hops for conventional FP lasers a simple design with a small external cavity was proposed. A glass plate mounted in front of the diode chip acts as the low-reflectivity mirror of an extended resonator and helps to select particular longitudinal modes within gain profile, even where laser action is not possible without the feedback. 

---