A possibility have been shown for amplification of weak emission intensity of microlasers based on cholesteric liquid crystals (CLC) by thin planar layers of both isotropic dye solutions and dye doped nematic liquid crystals. Very high gain index values (up to 500cm(-1)) and absolute amplification of about 15 have been demonstrated. Especially important is the anisotropy of gain in nematics, which allows the field control of the light amplification by ail electric field. The planar amplifiers using nematic liquid crystals can easily be integrated within single planar devices together with distributed feedback CLC microlasers. In such a hybrid structure, 6-times amplification of CLC microlaser intensity has been achieved.
Amplification of Laser Emission from Cholesteric Liquid Crystals by Planar Cells with Laser Dye Nematic and Isotropic Solutions
CIPPARRONE, Gabriella
2008-01-01
Abstract
A possibility have been shown for amplification of weak emission intensity of microlasers based on cholesteric liquid crystals (CLC) by thin planar layers of both isotropic dye solutions and dye doped nematic liquid crystals. Very high gain index values (up to 500cm(-1)) and absolute amplification of about 15 have been demonstrated. Especially important is the anisotropy of gain in nematics, which allows the field control of the light amplification by ail electric field. The planar amplifiers using nematic liquid crystals can easily be integrated within single planar devices together with distributed feedback CLC microlasers. In such a hybrid structure, 6-times amplification of CLC microlaser intensity has been achieved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
