geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Axicon based conical resonators with high power copper vapor laser


, : Axicon based conical resonators with high power copper vapor laser. Review of Scientific Instruments 81(7): 073110-073110

We report for the first time the performance of axicon based conical resonators (ABCRs) in a copper vapor laser, with novel results. The unstable conical resonator comprising of conical mirror (reflecting axicon) with axicon angle approximately pi/18, cone angle approximately 160 degrees, and a convex mirror of 60 cm radius of curvature was effective in reducing the average beam divergence to approximately 0.15 mrad (approximately 25 fold reduction compared to standard multimode plane-plane cavity) with output power of approximately 31 W. Extraction efficiency of approximately 50%-60% and beam divergence of <1 mrad was achieved in other stable ABCR configurations using flat and concave mirrors with the axicon. This is a significant improvement compared to 4-5 mrad normally observed in conventional stable resonators in copper vapor lasers. The conical resonators with copper vapor laser provide high misalignment tolerance beta approximately 4-5 mrad where beta is the tilt angle of the conical mirror from optimum position responsible for approximately 20% decline in laser power. The depth of focus d was approximately three times larger in case of conical resonator as compared to that of standard spherical unstable resonator under similar beam divergence and focusing conditions.

US$19.90

PMID: 20687708

DOI: 10.1063/1.3457847


Other references

Takayanagi, K.; Shimizu, T.; Tayama, Y.; Ikari, A.; Anzai, N.; Iwashita, T.; Asakura, J.; Hayashi, K.; Mitarai, T.; Hasegawa, H., 2015: Downregulation of transient receptor potential M6 channels as a cause of hypermagnesiuric hypomagnesemia in obese type 2 diabetic rats. We assessed the expression profile of Mg(2+)-transporting molecules in obese diabetic rats as a cause of hypermagnesiuric hypomagnesemia, which is involved in the development of insulin resistance, hypertension, and coronary diseases. Kidneys were...

Liplang, N.; Tudsri, S.; Sooksathan, I.; Limaroon, S.; Nilagupta, P., 2008: Effect of intercropping four legumes on the yields of the intercropped physic nut and soil properties in Pakchong District, Nakomrachasima. A comparison of seed yield of Physic nut (Jatropha curcus) intercropping with four different legumes species (Stylosanthes hamata cv. Verano, Stylosanthes guianensis cv. Thaphra stylo, Centrosema pascuorum cv. Cavalcade and Lablab purpureus) was c...

Frusher, S.D.; Hoenig, J.M., 2001: Estimating natural and fishing mortality and tag reporting rate of southern rock lobster (Jasus edwardsii) from a multiyear tagging model. Fishing and natural mortality rates and tag reporting rate for rock lobsters (Jasus edwardsii) in northwest Tasmania, Australia, were estimated using multiyear tagging models. These estimates are necessary for assessment of the resource. Several m...

Liu Fulai; X.Z.iqin; Xue Huaimin, 2004: Tracing the protolith, UHP metamorphism, and exhumation ages of orthogneiss from the SW Sulu Terrane (eastern China); SHRIMP U/ Pb dating of mineral inclusion-bearing zircons. Orthogneisses are the major country rocks hosting eclogites in the Sulu UHP terrane, eastern China. All of the analyzed orthogneiss cores from the main drilling hole of the Chinese Continental Scientific Drilling Project (CCSD-MH) have similar maj...

Broch, H., 1926: Nogen biogeografiske problemer. Naturen Bergen, 50: 291-304

Siboulet R.; Grinfeld S.; Deparis P.; Jaylet A., 1984: Micro nuclei in red blood cells of the newt pleurodeles waltlii induction with x rays and chemicals. P. waltlii, a typical long-tailed amphibian (Urodela) is proposed as a new animal for genetic toxicological studies. X-Rays and various clastogenic substances cause the formation of clearly visible micronuclei in the red blood cells (RBC). The pro...

Nes, W.R.; Dhanuka, I.C., 1988: Inhibition of sterol synthesis by D5-sterols in a sterol auxotroph of yeast defective in oxidosqualene cyclase and cytochrome P-450. The Journal of Biological Chemistry 263: 844-50

Vlahov, D., 2004: Transparent Reporting of Evaluations with Nonrandomized Designs (TREND). Journal of Urban Health 81(2): 163-164

W.C.angXin; Zhan AiJun; Liu HuiMou; Zhang RuKuan, 1999: Studies on the effects of trypsin on Newcastle disease virus La Sota strain. The La Sota strain of Newcastle disease virus (NDV) was treated with trypsin for 12 or 24 h at 37 degrees C and then used to inoculate 15-day-old chickens. The chickens survived without clinical signs. There was no significant difference in NDV ha...

Azanza, B.; Morales, J., 1994: Tethytragus nov. gen. and Gentrytragus nov. gen.: Two new bovids (Artiodactyla, Mammalia) from the middle Miocene: Phylogenetic relations between preVallesian bovids. The systematical study of pre-Vallesian bovids, related to caprotragoides, from the Madrid and Calatayud-Teruel Basins (Spain) made us revise all known material of this group. The systematics of Caprotragoides is extremely complex and contained hi...