• Publications
  • Influence
Inherent Issues and Challenges of Program Disturbance of 3D NAND Flash Cell
Program disturbance characteristics of 3D vertical NAND Flash cell array architecture have been investigated intensively. A new 'program Y disturbance' mode peculiar to 3D NAND Flash cell is defined.Expand
  • 19
  • 3
Absolute distance measurement with extension of nonambiguity range using the frequency comb of a femtosecond laser
Abstract. We revisit the method of synthetic wavelength interferometry (SWI) for absolute measurement of long distances using the radio-frequency harmonics of the pulse repetition rate of aExpand
  • 20
  • 2
Comb-referenced laser distance interferometer for industrial nanotechnology
A prototype laser distance interferometer is demonstrated by incorporating the frequency comb of a femtosecond laser for mass-production of optoelectronic devices such as flat panel displays andExpand
  • 10
  • 2
Absolute positioning by multi-wavelength interferometry referenced to the frequency comb of a femtosecond laser.
A multi-wavelength interferometer utilizing the frequency comb of a femtosecond laser as the wavelength ruler is tested for its capability of ultra-precision positioning for machine axis control. TheExpand
  • 24
  • 1
Testing of a femtosecond pulse laser in outer space
We report a test operation of an Er-doped fibre femtosecond laser which was conducted for the first time in outer space. The fibre-based ultrashort pulse laser payload was designed to meet space-useExpand
  • 54
Fourier-transform spectroscopy using an Er-doped fiber femtosecond laser by sweeping the pulse repetition rate
Femtosecond lasers allow for simultaneous detection of multiple absorption lines of a specimen over a broad spectral range of infrared or visible light with a single spectroscopic measurement. Here,Expand
  • 18
Real-time compensation of the refractive index of air in distance measurement.
A two-color scheme of heterodyne laser interferometer is devised for distance measurements with the capability of real-time compensation of the refractive index of the ambient air. A fundamentalExpand
  • 18
Compensation of the refractive index of air in laser interferometer for distance measurement: A review
We review the progress made for compensation of the refractive index of air in laser-based distance measurements in the field of precision engineering. First, a comprehensive analysis is introducedExpand
  • 20
Distance Measurements Using Mode-Locked Lasers: A Review
We present a progress review on the advance of distance measurements made at KAIST by making use of mode-locked lasers as the light source to meet ever-growing industrial demands on the measurementExpand
  • 12
Space radiation test of saturable absorber for femtosecond laser.
We report a space radiation test performed on a semiconductor-type saturable absorber (SA) for its use in outer space as a key mode-locking component of fiber-based femtosecond pulse lasers.Expand
  • 8