High Er3+ concentration low refractive index fluorophosphate glass for evanescent wave optical amplifiers

2008 ◽  
Vol 403 (19-20) ◽  
pp. 3470-3472 ◽  
Author(s):  
Liyan Zhang ◽  
Nan-Kuang Chen ◽  
Lili Hu
Keyword(s):  
Refractive Index ◽  
Evanescent Wave ◽  
Optical Amplifiers ◽  
Fluorophosphate Glass ◽  
Low Refractive Index

Photochemical Deposition of Transparent Low Refractive Index SiO2 Topcoat for Laser Head at Room Temperature

2004 ◽  
Vol 843 ◽  
Author(s):  
Y. Tezuka ◽  
M. Murahara
Keyword(s):  
Refractive Index ◽  
Evanescent Wave ◽  
Room Temperature ◽  
Visible Region ◽  
Antireflection Coating ◽  
Mixed Gas ◽  
Laser Head ◽  
Photochemical Deposition ◽  
Glass Slab ◽  
Low Refractive Index

ABSTRACTA transparent, low refractive index SiO 2 film was photo-chemically laminated on a glass slab laser head by the Xe2* excimer lamp in the atmosphere of NF3 and O2 mixed gas at room temperature; which made it possible to inhibit the decrease in the laser output power caused by the evanescent wave leakage.The transparent SiO2 film of 260nm thickness was laminated on the non-heated substrate by the lamp irradiation for one hour. The hardness of the film before annealing was 3 by Mohs’ Scale of Hardness, and its hardness improved to 5 after annealing at 250 degrees centigrade for one hour. The refractive index of the film was 1.42, being lower than the index of silica glass that is 1.46. Furthermore, the transmittance in the visible region increased by 2% with it s antireflection coating.

Anti–scatter coating on slab laser head for preventing evanescent wave by photo–oxidation of silicone oil

2005 ◽  
Vol 890 ◽  
Author(s):  
Takayuki Funatsu ◽  
Nobuhiro Sato ◽  
Yuji Sato ◽  
Takayuki Okamoto ◽  
Masataka Murahara
Keyword(s):  
Thin Film ◽  
Refractive Index ◽  
Evanescent Wave ◽  
Room Temperature ◽  
Silicone Oil ◽  
Total Reflection ◽  
Excimer Lamp ◽  
Laser Head ◽  
Slab Laser ◽  
Low Refractive Index

ABSTRACTA low refractive index, hard SiO2 film was photochemically coated on the surface of slab laser head at room temperature by using silicone oil and a Xe2 excimer lamp. Nd+:glass slab laser produces high power laser because the light is amplified with a repeated total reflection in the laser medium. However, an evanescent wave arises on the total reflection interface, which causes a loss of the light energy. A low refractive index film 2 μm thick is, therefore, needed to prevent this problem. The vacuum vapor deposition method as a dry process and the spin-coating method as a wet process are generally used for making optical thin films. The former method can laminate a hard thin film, but requires temperatures above 500°C, and the thermal denaturation of the optical substrate is unavoidable. On the other hand, the latter method can form a low refractive index thin film, but the produced thin film has a poor adhesiveness and a low hardness. Besides, all these films are inferior in water resistance. We, therefore, formed a water-resistant, hard, and low refractive index protective coating directly on the laser glass surface at room temperature with photochemical reaction by the Xe2 excimer lamp.

Xylene-Cellulose Caprate as a Histologic Mounting Medium of Low Refractive Index

1955 ◽  
Vol 30 (3) ◽  
pp. 133-134 ◽  
Author(s):  
R. D. Lillie ◽  
J. P. Greco Henson
Keyword(s):  
Refractive Index ◽  
Low Refractive Index

scholarly journals A Highly Sensitive SPR Sensors Based on Two Parallel PCFs for Low Refractive Index Detection

2018 ◽  
Vol 10 (4) ◽  
pp. 1-10 ◽  
Author(s):  
Famei Wang ◽  
Chao Liu ◽  
Zhijie Sun ◽  
Tao Sun ◽  
Banghua Liu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Highly Sensitive ◽  
Low Refractive Index ◽  
Refractive Index Detection

scholarly journals Air-trench splitters for ultra-compact ring resonators in low refractive index contrast waveguides

2008 ◽  
Vol 16 (1) ◽  
pp. 456 ◽  
Author(s):  
Nazli Rahmanian ◽  
Seunghyun Kim ◽  
Yongbin Lin ◽  
Gregory P. Nordin
Keyword(s):  
Refractive Index ◽  
Ring Resonators ◽  
Compact Ring ◽  
Refractive Index Contrast ◽  
Index Contrast ◽  
Low Refractive Index

Direct laser writing and applications of dielectric microstructures with low refractive index contrast

2011 ◽  
Author(s):  
Vygantas Mizeikis ◽  
Vytautas Purlys ◽  
Lina Maigyte ◽  
Kestutis Staliunas ◽  
Saulius Juodkazis
Keyword(s):  
Refractive Index ◽  
Direct Laser Writing ◽  
Laser Writing ◽  
Refractive Index Contrast ◽  
Direct Laser ◽  
Index Contrast ◽  
Low Refractive Index

Wide-Band Self-Collimation in Low Refractive Index Hexagonal Lattice

2021 ◽  
Author(s):  
Chun Xia ◽  
Stephen Kuebler ◽  
Noel Martinez ◽  
MANUEL Martinez ◽  
Raymond Rumpf ◽  
...  
Keyword(s):  
Refractive Index ◽  
Hexagonal Lattice ◽  
Wide Band ◽  
Low Refractive Index
Sign in / Sign up

Export Citation Format

Share Document