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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Optics and Photonics
Journal Basic Information
Journal DOI :
Optical Society of Korea
Editor in Chief :
Volume & Issues
Volume 3, Issue 4 - Dec 1992
Volume 3, Issue 3 - Sep 1992
Volume 3, Issue 2 - Jun 1992
Volume 3, Issue 1 - Mar 1992
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Design of flat-field XUV spectrograph with a toroidal mirror
Korean Journal of Optics and Photonics, volume 3, issue 2, 1992, Pages 77~85
The design of a flat-field XUV spectrograph is optimized for a high throughput, aberration-corrected spectral image in the wavelength region of 50-300
The varied-line spacing (VLS) concave grating theory for an XUV spectrograph with a toroidal mirror in front of an entrance slit is derived. Since the derived theory includes the arbitrary shaped source, it is able to correct the limit of the simple optimization theory which considers only a point source at the center of the entrance slit. The reflection matrix at the toroidal mirror and the diffraction matrix at VLS grating are derived and compared with those of a holographic grating. The absolute energy efficiency of a flat-field spectrograph is calculated by considering the reflectivities of the toroidal mirror and the Au coated concave grating and the grating efficiency. The alignment sensitivity of the toroidal mirror and the concave grating is investigated, and the method to achieve the best imaging of XUV spectrum is discussed. The calculated resolving power of the flat-field XUV spectrograph is more than 4000 in the aberration-corrected wavelength range. The focused spot size at the dispersion plane is less than
at the wavelength 100
It is shown that a high throughput characteristic can also be achieved through a careful adjustment of alignment parameters.
Optical design of soft X-ray region monochromator
Korean Journal of Optics and Photonics, volume 3, issue 2, 1992, Pages 86~91
We describe the design of a soft X-ray grating monochromator for synchrotron radiation in the photon energy range 300~1200eV. We investigate the optimum condition in optical parameters of CEM (cylindrical element monochromator), whose performance is well known by Dragon beam line installed recently at Brookhaven National Laboratory by C. T. Chen, fitting the parameter of PLS (Pohang Light Source) storage ring construction.
Fabrication of a rotating analyzer type spectroscopic ellipsometer and characterization of fluoride thin films
Korean Journal of Optics and Photonics, volume 3, issue 2, 1992, Pages 92~100
A Spectroscopic Ellipsorneter(SE) is fabricated. The PSA configuration of the rotating analyzer type where the effects of the imperfect optical elements can be minimized is adopted. The straight through operation shows that the standard deviations of tan
are less than 0.2% in the spectral range of 300nm-850nm. From the film data of ellipsometric spectra the bulk dispersion relation of a few fluorides and the void distribution inside the fluoride thin films are obtained.
Measurement of thermooptic coefficient by electronic speckle pattern interferometer
Korean Journal of Optics and Photonics, volume 3, issue 2, 1992, Pages 101~104
One of coefficients showing the degree of thermal effects is the thermooptic coefficient. It is the ratio of the refractive index change versus the change of temperture and was already measured by other general interferometric method. In this research, an optical system with the electronic speckle pattern interferometer complementing faults of the general interferometer was developed and its potentiality was validated experimentally.
Measurement of magnetic kerr rotation and faraday fotation angles by polarization modulation method
Korean Journal of Optics and Photonics, volume 3, issue 2, 1992, Pages 105~110
In order to measure fine rotation angles by magneto-optic effects of magneto-optical recording thin films, a polarization modulation method is used. In the experiment, the polarization of laser (He-Ne laser) beam is modulated by a Faraday rotator and the amplified modulated signals are selectively detected by phase sensitive detector. The magnetic Kerr rotation and Faraday rotation hysteresis loops are investigated by this method for thermally evaporated amorphous TbFeCo thin films and RF sputtered garnet thin films. Rotation angles about
are measured easily from TaFeCo thin films. In the case of longitudinal Kerr rotation, very small rotation angle of
is measured with good accuracy of the measurement (about
). And it is found that each thin films have the hysteresis curves of high coercivity and good squareness.
Luminous efficiency of ZnS:Sm,F TFEL devices
Korean Journal of Optics and Photonics, volume 3, issue 2, 1992, Pages 111~116
ZnS:Sm, F TFEL devices with double insulating layer are prepared by e-beam evaporation method. Electroluminescence and luminous efficiency of the device fabricated at various conditions are investigated. The main transitions on the emission spectra for ZnS:Sm, F TFEL device occur at
.Among them, the dominant spectral line and its corresponding transition occur at
(650 nm) and results in an orange-red emission color. The optimum concentration and substrate temperature for the ZnS:Sm, F TFEL device are around 1 wt% and
. Luminous efficiency for the device is the largest at optimum condition.
A study of 2-color 3-step selective photoionization for mercury atoms
Korean Journal of Optics and Photonics, volume 3, issue 2, 1992, Pages 117~122
2-color 3-step resonance photoionization scheme has been used for selective photoionization of mercury isotopes. The levels of
were selected as intermediate excited levels, and the laser wavelengths used were 253.7 nm for the first excitation and 313.2 nm for the second excitation and ionization. Selective excitation for individual isotope was realized in the first excitation step with a single-longitudinal-mode (SLM) dye laser rrf ~700 MHz linewidth. For the second excitation and ionization step, a dye laser with relatively large linewidth of ~5 GHz was used. In this work the effect of laser intensities on isotope selectivity was analyzed from the mass spectra obtained in real time from the time-of-flight mass spectrometer.
Construction of an Optically Pumped Cesium Atomic Clock
Korean Journal of Optics and Photonics, volume 3, issue 2, 1992, Pages 123~132
We designed and constructed the Cs beam tube which consists of a Ramsey cavity, four C-field rods, fluorescence detecting systems, and etc. for developing an optically pumped Cs atomic clock. A semiconductor laser was used for optical pumping and probing in the Cs beam. We observed Ramsey resonance signal by detecting the fluorescence signal in the probing region as the microwave frequency injected into the Ramsey cavity was scanned near 9192.6 MHz which corresponds to the "clock transition" of Cs atoms. We found that the linewidth of the Ramsey signal was 200 Hz, the magnetic field intensity was
when the current of 0.8A flowed in the C-field rods, and the second order Zeeman shift by the magnetic field was 3.17 Hz.s 3.17 Hz.
Comparison of laser electrodes for efficient uniform disharge
Korean Journal of Optics and Photonics, volume 3, issue 2, 1992, Pages 133~136
Calculation and comparison of the design parameter between Chang and Ernst profile that can be used for the uniform discharge in excimer or TEA
laser are carried out. This result can be used to establish the initial
-value in the design of electron. Also, calculation shows that Ernst profile is 2-3 times superior to Chang profile in uniformity of electric field with respect to the same k-value (
X-선에 대한 모세관 광유도광학
Korean Journal of Optics and Photonics, volume 3, issue 2, 1992, Pages 137~140