Tunable two-photon pumped lasing using a holographic polymer-dispersed liquid-crystal grating as a distributed feedback element

A holographic polymer-dispersed liquid-crystal (H-PDLC) grating film was employed as an angle-dependent and narrow spectral-band feedback control element for two-photon pumped lasing in a dye solution, 4-[N-(2-hydroxyethyl)-N-(methyl)amino phenyl]-4′-(6-hydroxyhexyl sulfonyl) stilbene (APSS) in dimethyl sulphoxide. The grating film contained about 80 layers of liquid-crystal domains periodically dispersed in an ∼15 μm thick polymer film, featuring a maximum reflectance of 75% at 561 nm position with an ∼9 nm spectral bandwidth. The output lasing wavelength could be tuned from 561.5 to 548.5 nm and the lasing bandwidth changed from 5 to 3 nm when the incidence angle on the grating film varied from 0° to 22°. The overall lasing efficiency was measured to be 10%.

[1]  Lalgudi V. Natarajan,et al.  Switchable Holographic Polymer-Dispersed Liquid Crystal Reflection Gratings Based on Thiol−Ene Photopolymerization , 2003 .

[2]  G. Crawford,et al.  Electrically Switchable Bragg Gratings , 2003 .

[3]  J. Qi,et al.  Tunable face-centered-cubic photonic crystal formed in holographic polymer dispersed liquid crystals. , 2003, Optics letters.

[4]  Lalgudi V. Natarajan,et al.  Electrically Switchable, One‐Dimensional Polymeric Resonators from Holographic Photopolymerization: A New Approach for Active Photonic Bandgap Materials , 2003 .

[5]  R. Sutherland,et al.  Switchable orthorhombic F photonic crystals formed by holographic polymerization-induced phase separation of liquid crystal. , 2002, Optics express.

[6]  A. Abbotto,et al.  Push–Pull Organic Chromophores for Frequency‐Upconverted Lasing , 2000 .

[7]  L. V. Natarajan,et al.  Holographic Polymer-Dispersed Liquid Crystals (H-PDLCs)1 , 2000 .

[8]  P. Prasad,et al.  Two-photon pumped partially cross-linked polymer laser , 1997 .

[9]  Paras N. Prasad,et al.  Studies of two-photon pumped frequency-upconverted lasing properties of a new dye material , 1997 .

[10]  J. Bhawalkar,et al.  Two-photon-pumped cavity lasing in a dye-solution-filled hollow-fiber system. , 1995, Optics letters.

[11]  Wen-tao Yu,et al.  Synthesis, structures and two-photon pumpedup-conversion lasing properties of two new organic salts , 2000 .

[12]  P. Prasad,et al.  Longitudinally two-photon pumped leaky waveguide dye film laser , 1998 .