Seok Hwan Jeong

All-optical wavelength conversion in a GaInAsP/InP optical gate loaded with a Bragg reflector.

Analysis and demonstration of single-passband response and tuning characteristics in a chirped ladder interferometric filter for a widely tunable laser diode.

Optical 90 degree hybrid with broad operating bandwidth of 94 nm.

Compact optical 90 degrees hybrid employing a tapered 2x4 MMI coupler serially connected by a 2x2 MMI coupler.

Optical 45 degrees hybrid for demodulating 8-ary DPSK signal.

Optical 60° hybrid for demodulating six-level DPSK signal.

Renal venous doppler ultrasonography in normal subjects and patients with diabetic nephropathy: value of venous impedance index measurements.

Flat-topped and low loss silicon-nanowire-type optical MUX/DeMUX employing multi-stage microring resonator assisted delayed Mach-Zehnder interferometers.

High-output-power, single-wavelength silicon hybrid laser using precise flip-chip bonding technology.

Low-loss, flat-topped and spectrally uniform silicon-nanowire-based 5th-order CROW fabricated by ArF-immersion lithography process on a 300-mm SOI wafer.

Si-nanowire-based multistage delayed Mach-Zehnder interferometer optical MUX/DeMUX fabricated by an ArF-immersion lithography process on a 300 mm SOI wafer.