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Analysis and correction of the dependency between laser scanner intensity values and range
Terrestrial laser scanning intensity range correction
2014/7/30
Intensity values, which are registered by a terrestrial laser scanner system (TLS) for each point of a 3D point cloud in addition to its coordinates, are affected by the characteristic of the measured...
THE EFFECTS OF LASER REFLECTION ANGLE ON RADIOMETRIC CORRECTION OF THE AIRBORNE LIDAR INTENSITY DATA
Radiometric Correction LiDAR Intensity Data Reflection Angle Surface Normal Land Cover Classification
2014/6/5
Radiometric correction (RC) of the airborne Light Detection And Ranging (LiDAR) intensity data has been studied in the last few years. The physical model of the RC relies on the use of the laser range...
Simple and Scalable WDM/TDMA-PON using Spectral Slicing and Forward Error Correction
Fiber optics communications Networks combinatorial network design
2015/5/22
We describe a simple and scalable WDM/TDMA PON system that uses spectral slicing and FEC in burst-mode upstream transmissions. The sensitivity was improved to -31.5 dB at a sliced bandwidth of 400 GHz...
Soft-decision Forward Error Correction in a 40-nm ASIC for 100-Gbps OTN Applications
40-nm ASIC OTN Application Error Correction
2015/5/15
Soft-decision forward error correction provides high coding gain, but typically with high complexity. We present a soft-decision turbo product code with >11 dB NECG and reasonable complexity in a 40-n...
Spherical Aberration Correction Using Refractive-Diffractive Lenses with an Analytic-Numerical Method
spherical aberration flat or curved phase coefficients
2011/4/21
We propose an alternative method to design diffractive lenses free of spherical aberration for monochromatic light. Our method allows us to design diffractive lenses with the diffraction structure rec...
FPGA based Prototyping of Next Generation Forward Error Correction
FPGA based Prototyping Generation Forward Error Correction
2015/7/15
The concatenation of LDPC and RS codes has been demonstrated using a real-time FPGA prototype.A net coding gain of 9.0dB for 31.3-Gb/s was achieved with 20.5% redundancy for an input BER of 10 -2 .
Wavefront Correction of Violet Laser Diode and Color Micro-marking on Plastic Surface
Violet Laser Diode Color Micro-Marking Wavefront Correction
2009/6/1
The laser diode (LD) is a light source characterized by small size, light weight and high performance. Osaka University has been actively conducting research and development to precisely collect and d...
High Pulse Energy, Rep. Rated Nd:glass Laser with Wavefront Correction
Diode-pumped Lasers Phase conjugate High average power laser
2009/6/1
We report a high average power and high pulse energy diode-pumped Nd:glass master oscillator power amplifier system that is consisted of a thermally-edge-controlled zigzag slab amplifier and stimulate...
Data Rate Enhancement of RSOA-based WDM PON Systems using Feed-forward Equalizer and Forward Error Correction
WDM PON Systems Feed-forward Equalizer
2015/8/6
Effect of FFE and FEC to enhance the data rate of RSOA was investigated. 4.75Gbit/s was achieved by 0.6GHz RSOA using 4-tap FFE and ~14% FEC.
Improved Frequency Offset Correction in Coherent Optical OFDM Systems
Frequency Offset Correction Optical OFDM Systems
2015/7/30
We extended a pilot symbol frequency offset estimation scheme and applied it in combination with a pilot subcarrier compensator. Optimum system sensitivity was found up to few 100MHz frequency offset.
We introduce the novel parallel-aligned liquid crystal wavefront corrector (LC WFC) with 1920*480 pixels designed to operate at phase-only mode. The optical characteristics of the LC WFC were measured...
Examination and optical correction of the vision system following the procedure of cataract removal
physiological optics
2011/5/3
The main goal of this thesis was a comprehensive assessment of the condition of the vision system following cataract surgery and implantation of posterior chamber artificial lens and assessment of the...