Birefringent filter

J.M. Knox, P. M. Marshall, and R.T. Murray, Birefringent filter temperature sensor, Proc. 1st Conf. Opt. Fibre Sens, (OFS83), p. 1, IEE, London (1983). 

A. M. Title, Improvement of birefringent filters. II Achromatic waveplates, Applied Optics, 14, 229 (1975). 

Fig 5 Bandwidth of an FM dye laser tuned by a three plate birefringent filter as a function of the detuning between the passive node spacing and the driving frequency applied to the phase modulator. 

Figure 7 Schematic of the laser system used in the Raman FID and echo experiments. PC = Pulse compressor AOM = acousto-optic modulator PD = photodiode FB = feedback electronics PBS = polarizing beamsplitter 3PBF = 3-plate birefringent filter SDL/LDL = Stokes/Laser dye laser P = pellicle AC = autocorrelator OC = output coupler LBO/KDP = doubling crystals. Final pulses have widths of 0.5-1 ps and energies of 0.3-1 mJ (From Ref. 6.)... 

FIGURE 19 Autocorrelation traces taken during setup of the cavity-dumped laser of Fig. 16, showing changes in the pulses with cavity length adjustment. A three-plate birefringent filter and a 1-W 532-nm pump beam were used without an absorber jet for this data. (Courtesy of Coherent, Inc., Palo Alto, CA.)... 

Commercial cw dye laser systems (Sect. 5.5) generally use a different realization of single-mode operation (Fig. 5.41). The prisms are replaced by a birefringent filter, which is based on the combination of three Lyot filters (Sect. 4.2.9), and the thick etalon is substituted by a Fabry-Perot interferome-... 

Fig. 5.41. Mode selection in the cw dye laser with a folded cavity using a birefringent filter, a tilted etalon, and a prism FPI (Coherent model 599). The folding angle is chosen for optimum compensation of astigmatism introduced by the dye jet...

Fig. 5.78a,b. Two possible resonator designs for cw color-center lasers (a) folded linear resonator with astigmatic compensation and (b) ring resonator with optical diode for enforcing only one direction of the traveling laser wave and tuning elements (birefringent filter and etalon) [5.145]... 

Coarse wavelength tuning can be accomplished with a birefringent filter (Lyot filter, see Sect. 4.2.9) that consists of three birefringent plates with thicknesses d, q d, Q2d (where q, q2 are integers), placed under the Brewster angle inside the dye laser resonator (Fig. 5.93). Contrary to the Lyot filter discussed in Sect. 4.2.9, no polarizers are necessary here because the many Brewster faces inside the resonator already define the direction of the polarization vector, which lies in the plane of Fig. 5.93. 

Fig. 5.94. Transmission T k) of a birefringent filter with three Brewster plates of KDP, with plate thickness d] = 0.34mm, J2 = 4d/i, J3 = I6d] [5.189]...

Figure 5.102 Transmission T(A) of a birefringent filter with three Brewster plates of KDP, with plate thickness...

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