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(Color online) Absorbance spectra of thick cells filled with (1) CLC621, and (2) CLC614, which show the band of the DCM dye with and Bragg stop band in the range of . The dash-dotted line shows absorbance of thick cell filled with Rh640 dye solution in glycerine (the absorbance at the wavelength of its maximum, , measured with a thinner cell is 6.4). Both CLC lase at the edge of the Rh640 absorption at and , respectively. The spectrum of laser generation of the rhodamine solution itself depends on pump and situated at .
(Color online) Pump energy dependence of the energy of laser emission from CLC621 and CLC614 (curves 1 and 2, respectively, measured in zone A of the device shown in Fig. 1), and the emission energy of the same CLC cells amplified by the Rh640 solution (curves and , respectively, measured in zone C). The value of on the horizontal scale corresponds to pump energy density . Inset: gain coefficient of the amplifying cell at two different wavelengths (curve ) and (curve 2) as a function of pump energy.
(Color online) Pump energy dependence of the wavelength for the laser emission spectral maximum for CLC621 and CLC614 oscillators (curves 1 and 2, respectively) and for the same CLC cells amplified by the Rh640 solution (curves and , respectively). These measurements have been done in zones A and C of the device. Curve Rh640 shows the pump dependence of of the unlocked amplified spontaneous emission of Rh640 in glycerine measured in zone B. The value of on the horizontal scale corresponds to pump energy density .
(Color online) Calculated spectra of the (1) absorption and (2) emission cross sections for Rh640 molecules and (3) the gain coefficient corresponding to the dye molecule population density in the excited state .
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