Abstract
KTa0.65Nb0.35O3 and Fe-doped KTa0.65Nb0.35O3 crystals were grown by the top-seeded solution growth method (TSSG). Fe ion doping significantly improves the electro-optic properties of cubic KTN crystals. We describe their electro-optic modulation theory and experimental research. The electro-optic modulation waveform deduced by theoretical calculation is basically consistent with the waveform measured in the experiment. We observed the attenuation of light modulation under multiple voltage cycles. The modulation curve of the crystal is inconsistent when the crystal voltage is boosting and bucking. Under the same voltage condition, the higher the incident light power, the faster the modulation depth attenuation. In this experiment, the size of the KTN crystal chip is 6 mm × 5 mm × 2 mm. We obtain the effective electro-optic coefficient as s11 − s12 = 1.34 × 10−15 m2/V2; the half-wave voltage near the Curie temperature is 39 V.
Highlights
An electro-optic modulator (EOM) is a signal-controlled device that can be used to control the intensity, phase and polarization status of a laser beam
This is a better Fe doping concentration that we found through experiments [11]
Our laboratory has recently done a lot of work in improving the optical quality of crystals
Summary
An electro-optic modulator (EOM) is a signal-controlled device that can be used to control the intensity, phase and polarization status of a laser beam. It is widely used for high-speed optical communications, Q-switching of solid-state lasers, and active mode locking [1,2,3]. Researchers have found that copper and iron doping in KTN crystals of the tetragonal system can greatly improve the photorefractive. TheREVIEW photorefractive effect and the electro-optic effect are similar mechanism, which inspired us to develop an ion doping method in cubic crystal to improve its the thermal expansion properties of KTN crystals [8]. The influence the laser voltage electro-optical intensity modulation crystals, andofcompare the power influenceand of Fe doping on on the dielectric constant. The influence of the laser power and voltage on electro-optical intensity modulation was on studied
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
