LASER ACTION IN OPTICALLY‐PUMPED CN

1966 ◽  
Vol 9 (6) ◽  
pp. 230-232 ◽  
Author(s):  
M. A. Pollack
Keyword(s):  
Laser Action ◽  
Optically Pumped

scholarly journals Optically Pumped Intensive Light Amplification from a Blue Oligomer

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1534 ◽  
Author(s):  
Aljaafreh ◽  
Prasad ◽  
AlSalhi ◽  
Alahmed ◽  
M. Al-Mogren
Keyword(s):  
Self Assembly ◽  
High Efficiency ◽  
Laser Action ◽  
Pump Energy ◽  
Optically Pumped ◽  
Time Resolved ◽  
Protic Solvents ◽  
Light Amplification ◽  
Wide Range ◽  
The Fourier Transform

We demonstrated the time-resolved dynamics of laser action from the conductive oligomer (CO) 1,4-Bis(9-ethyl-3-carbazo-vinylene)-9,9-dihexyl-fluorene (BECV-DHF). Absorption and fluorescence spectra were studied for BECV-DHF in different solvents under a wide range of concentrations. The Fourier-transform infrared spectroscopy (FTIR) spectrum was measured using simulation and experiments. The Ultraviolet-Visible (UV-VIS) spectra of the BECV-DHF were simulated in two different solutions. This CO formed a dimer and had two vibration bands in nonpolar solvents, partially dissolved in polar protic solvents, and created an H-type aggregate in polar aprotic solvents. BECV-DHF produced amplified spontaneous emission (ASE) at 464 nm in many solvents. The high efficiency of ASE is due to the waveguiding and self-assembly nature of the oligomer, which is very rare for optically pumped systems. However, BECV-DHF did not produce ASE in polar protic solvents. BECV-DHF produced ASE in both longitudinal and transverse pumping, and the full-width half maximum (FWHM) was 4 nm and 8 nm respectively for different solvents, such as toluene and acetone. The CO had a very low threshold pump energy (~0.5 mJ). The ASE efficiency was approximately 20%. The time-resolved spectroscopy (TRS) studies showed a temporal Gaussian-shaped ASE output from this CO. BECV-DHF shows remarkably high stability compare to the conjugated polymer (CP) PFO-co-pX.

Optically pumped laser action in dideuteroacetylene

1978 ◽  
Vol 26 (3) ◽  
pp. 422-426 ◽  
Author(s):  
H.N. Rutt ◽  
J.M. Green
Keyword(s):  
Laser Action ◽  
Optically Pumped ◽  
Optically Pumped Laser

scholarly journals Optically Pumped Laser Action on Nitride Based Separate Confinement Heterostructures Grown along the (11¯20) Crystallographic Direction

2007 ◽  
Vol 112 (2) ◽  
pp. 467-472
Author(s):  
H. Teisseyre ◽  
M. Szymański ◽  
A. Khachapuridze ◽  
C. Skierbiszewski ◽  
A. Feduniewicz-Żmuda ◽  
...  
Keyword(s):  
Laser Action ◽  
Crystallographic Direction ◽  
Optically Pumped ◽  
Optically Pumped Laser

scholarly journals Random Lasing from a Layer of ZnO Powder Painted on Glass Substrate under Excitation of Nanosecond and Picosecond Laser Pulses

2012 ◽  
Vol 21 (4) ◽  
pp. 353 ◽  
Author(s):  
Nguyen The Binh ◽  
Pham Van Thin ◽  
Pham Thu Nga ◽  
Nguyen Anh Tuan
Keyword(s):  
Glass Substrate ◽  
Laser Action ◽  
Picosecond Laser ◽  
Average Diameter ◽  
Laser Pulses ◽  
Random Lasing ◽  
Optically Pumped ◽  
Colloidal Spheres ◽  
Picosecond Laser Pulses ◽  
Zno Powder

The ZnO powder which consists of monodisperse colloidal spheres with average diameter of 100-300 nm was synthesized by hydrolysis of Zinc acetate dehydrate. The random lasing around 380 nm was produced from a layer of the ZnO powder painted on a glass substrate and optically pumped at 355 nm. Our experimental results show that random laser action of a layer of ZnO spherical nanoparticles and the characteristics of these random lasers under excitation of nanosecond and picosecond laser pulses.

Submillimeter laser action of CW optically pumped CF<inf>3</inf>Br

1979 ◽  
Vol 15 (10) ◽  
pp. 1088-1090 ◽  
Author(s):  
J. Pontnau ◽  
J.-M. Lourtioz ◽  
C. Meyer
Keyword(s):  
Laser Action ◽  
Optically Pumped ◽  
Submillimeter Laser
Sign in / Sign up

Export Citation Format

Share Document