Optical variable gain tilt filter with temperature compensation

Abstract

By analyzing the transmission function of a voltagecontrolled electro-optic transparent ceramic material, OptoCeramic V R PMN-PT based variable gain tilt filter (VGTF), its temperaturedependent properties are obtained and a temperature-dependent calculation model is established with the temperature-dependent coefficients obtained by the combination of experimental and numerical methods. Then through the real-time temperature surveillance, the control voltages can be dynamically adjusted via a USB interface and the VGTF achieves precise control and remains stable within temperature range from 25 C to 70 C.

La-doped PMN–PT transparent ceramics with ultra-high electro-optic effect and its application in optical devices

“…The above macroscopic analysis of explaining the high EO effect is reasonable but still not comprehensive and profound. Among the references we have found so far, there is some literature [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]28,29] that studies ferroelectric domains of the PMN-PT ceramics, but lacks very clear domain morphology characterization. We obtained the domain morphology and studied the domain reversal (polarization behavior) from microscopic perspective to further demonstrate instability of the intermediate ferroelectric state.…”

“…Utilizing the high EO effect of PMN-PT to design optical devices with tuning capability such as TOF is very valuable; however, application studies of the PMN-PT ceramics are rarely reported [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. To realize the application of the PMN-PT transparent ceramics in EO tunable filters, we first tested TFPF based on 2/75/25 ceramic sheet.…”

“…With widespread applications of the 5th generation (5G) mobile communication technology, it has promoted the rise of many technologies, such as self-driving technology. Compared with the past 4th generation (4G) mobile networks, the 5G network has wider bandwidth, lower delay, and higher speed, which puts forward higher requirements for the properties of various optical devices in optical communication networks, such as tunable optical filter (TOF) and polarization controller [1][2][3]. Therefore, many researchers are devoted to developing different electro-optic (EO) materials, such as LiNbO 3 (LN), KH 2 PO 4 (KDP), lead lanthanum zirconate titanate (PLZT), and Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 (PMN-PT).…”