Abstract
The electro-optic parameters of point group
2m phosphate and arsenate crystals have been measured in the wavelength range 400 to 700 nm at room temperature. The values for the half-wave voltage Vλ/2 and the electro-optic constant r63 at 550 nm are:
Material | Vλ/2 kV | r63 cm/V |
---|
ADP | NH4H2PO4 | 9.20 | 8.4 × 10−10 |
D–ADP | ND4D2PO4 | 6.55 | 11.9 × 10−10 |
KDP | KH2PO4 | 7.45 | 10.6 × 10−10 |
D–KDP | KD2PO4 | 3.85 | 20.8 × 10−10 |
RbDP | RbH2PO4 | 5.15 | 15.5 × 10−10 |
ADA | NH4H2PO4 | 7.20 | 9.2 × 10−10 |
KDA | KH2AsO4 | 6.50 | 10.9 × 10−10 |
D–KDA | KD2AsO4 | 3.95 | 18.2 × 10−10 |
RbDA | RbH2AsO4 | 4.85 | 14.8 × 10−10 |
D–RbDA | RbD2AsO4 | 3.40 | 21.4 × 10−10 |
CsDA | CsH2AsO4 | 3.80 | 18.6 × 10−10 |
D–CsDA | CsD2AsO4 | 1.95 | 36.6 × 10−10 |
The material D–CsDA requires Vλ/2 = 1.95 kV; and this is the smallest so far measured for the longitudinal linear electro-optic effect. Single crystals of D–CsDA have the advantage over others in modulator applications where lower Vλ/2 is a major criterion.
© 1969 Optical Society of America
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