Hong-Sik Jung

Electro-optic Electric Field Sensor Utilizing Ti:LiNbO 3 Symmetric Mach-Zehnder Interferometers

The use of a Ti:LiNbO3 symmetric Mach-Zehnder interferometric intensity modulator with a push-pull lumped electrode and a plate-type probe antenna to measure an electric field strength is described. The modulator has a small device size of 46×7×1 and operates at a wavelength of 1.3 μm. The output characteristic of the interferometer shows the modulation depth of 100% and 75%, and Vπ voltage of 6.6 V, and 6.6 V at the 200 Hz and 1 KHz, respectively. The minimum detectable electric field is ~1.84 V/m, ~3.28 V/m, and ~11.6 V/m, corresponding to a dynamic range of about ~22 dB, ~17 dB, and ~6 dB at frequencies of 500 KHz, 1 MHz and 5 MHz, respectively.

2×2, 1×4 Ti:LiNbO 3 digital optical switches

We propose and demonstrate a novel polarization- and wavelength-independent digital electro-optic switch in Ti:LiNbO 3 with switching voltages of ±32 at 1.55 μm wavelength. This 2×2 integrated optic switch is characterized by a steplike response to the applied voltage. Switching is achieved through adiabatic mode evolution in an asymmetric waveguide junction. An average insertion loss of ~4.5 dB and polarization-independent switching with average cross talk of −12 dB are achieved. The demonstration of 1×4 polarization-independent switches with digital optical switch elements is eventually reported.

Electro-optic electric-field sensors utilizing Ti∶LiNbO31×2 directional coupler with dipole antennas

Abstract. We have demonstrated a Ti∶LiNbO3 electro-optic electric-field sensor based on 1×2 directional optical waveguide coupler. The symmetric geometry of the 1×2 directional coupler provided the sensor with unique characteristics of intrinsic 3-dB operating point and two complementary outputs. A DC switching voltage of ∼12  V and an extinction ratio of ∼8.1  dB were observed with the coupler at a wavelength of 1.3 μm. The minimum detectable electric fields are ∼0.99 and ∼1.67  V/m corresponding to a dynamic range of ∼29.5 and ∼25  dB at frequencies of 20 and 50 MHz, respectively. The sensors exhibit almost linear response for the applied electric-field intensity from 0.29 to 29.8  V/m.

Integrated-Optic Electric-Field Sensor Utilizing a Ti:LiNbO 3 Y-fed Balanced-Bridge Mach-Zehnder Interferometric Modulator With a Segmented Dipole Antenna

We have demonstrated a

Photonic Electric-Field Sensor Utilizing an Asymmetric Ti:LiNbO3 Mach–Zehnder Interferometer with a Dipole Antenna

Ti:LiNbO_3

Ti:LiNbO3 Integrated Optic Electric-Field Sensors based on Electro-Optic Effect

electro-optic electric-field sensor utilizing a

Integrated-optic electric field sensors utilizing Ti:LiNbO 3 Mach-Zehnder interferometric modulators

1{\times}2

Šolc-Type Wavelength Filters Based on TE↔TM Mode Conversion Utilizing Periodically Poled Ti-Diffused Lithium Niobate Channel Waveguides

Y-fed balanced-bridge Mach-Zehnder interferometric (YBB-MZI) modulator, which uses a 3-dB directional coupler at the output and has two complementary output waveguides. A dc switching voltage of ~25 V and an extinction ratio of ~12.5 dB are observed at a wavelength of

Ti:LiNbO 3 2x2 Optical Add/Drop Multiplexers Utilizing Acousto-Optic Effect

1.3{\mu}m

Electro-optic intensity modulators at λ=1.55 μm utilizing strain-optic effects in LiNbO3

. For a 20 dBm rf input power, the minimum detectable electric fields are ~8.21, 7.24, and ~13.3 V/m, corresponding to dynamic ranges of ~10, ~12, and ~7 dB at frequencies of 10, 30, and 50 MHz respectively. The sensors exhibit almost linear response for an applied electric-field intensity from 0.29 V/m to 29.8 V/m.