Kwang Yong SongSummaryAffiliation: Chung-Ang University Country: Korea Publications
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Publications
High-sensitivity optical time-domain reflectometry based on Brillouin dynamic gratings in polarization maintaining fibersKwang Yong Song
Department of Physics, Chung Ang University, Seoul 156 756, South Korea
Opt Express 20:27377-83. 2012..Distributed measurements of the BDG spectra are presented with 80 cm spatial resolution in 935 m range, showing strain and temperature sensitivities of 1.37 MHz/με and -57.48 MHz/°C, respectively...- Effects of induced birefringence on Brillouin dynamic gratings in single-mode optical fibersKwang Yong Song
Department of Physics, Chung Ang University, 84 Heukseok Ro, Dongjak Gu, Seoul 156 756, South Korea
Opt Lett 37:2229-31. 2012..Meanwhile, the spectrum is almost immune to circular birefringence induced by twist with a rate of up to 24 turns/m... - Operation of Brillouin dynamic grating in single-mode optical fibersKwang Yong Song
Department of Physics, Chung Ang University, 221 Heukseok dong, Dongjak Gu, Seoul 156 756, South Korea
Opt Lett 36:4686-8. 2011..When a 100 m single-mode fiber is used, a reflectance of 8% with a spectral bandwidth as low as 2.4 MHz is achieved, which is less than 10% of ordinary Brillouin gain bandwidth... 
Gain-assisted superluminal propagation in tellurite glass fiber based on stimulated Brillouin scatteringKwang Yong Song
Dept of Physics, Chung Ang University, Seoul 156 756, Korea
Opt Express 16:225-30. 2008..19 is achieved with 6.9 dB amplification in 34 ns Gaussian pulses, leading to the group index of 0.84...- High-repetition-rate distributed Brillouin sensor based on optical correlation-domain analysis with differential frequency modulationKwang Yong Song
Department of Physics, Chung Ang University, 221 Heukseok dong, Dongjak Gu, Seoul 156 756, Korea
Opt Lett 36:2062-4. 2011..A distribution map of Brillouin frequency variation along a 100 m optical fiber is acquired at a repetition rate of 20 Hz with an accuracy of ±2.5 MHz and a spatial resolution of about 80 cm... - Simplified Brillouin optical time-domain sensor based on direct modulation of a laser diodeKwang Yong Song
Department of Physics, Chung Ang University, Seoul, Korea
Opt Express 18:24012-8. 2010..Maps of Brillouin frequency shift are obtained with a spatial resolution of 2 m and an accuracy of ±2 MHz in a 2 km optical fiber... - Observation of narrowband intrinsic spectra of Brillouin dynamic gratingsKwang Yong Song
Department of Physics, Chung Ang University, Seoul, 156 756 South Korea
Opt Lett 35:2958-60. 2010..A 3 dB bandwidth as narrow as 10.5 MHz is observed with the Brillouin dynamic grating generated in a 9 m uniform fiber... - Tunable optical delays based on Brillouin dynamic grating in optical fibersKwang Yong Song
Dept of Physics, Chung Ang University, Seoul, Korea
Opt Express 17:10344-9. 2009..Tunable time delays of up to 132 ns are achieved with an 82 ns Gaussian pulse... - Optical time-domain measurement of Brillouin dynamic grating spectrum in a polarization-maintaining fiberKwang Yong Song
Department of Physics, Chung Ang University, Seoul 156 756, Korea
Opt Lett 34:1381-3. 2009..Large temperature sensitivity as high as -50.9 MHz/ degrees C is observed with 2 m spatial resolution in 100 m range... - Differential measurement scheme for Brillouin optical correlation domain analysisJi Ho Jeong
Center for Opto Electronic Convergence Systems, Korea Institute of Science and Technology KIST, Seoul, South Korea
Opt Express 20:27094-101. 2012..In experiments, a five-fold enhancement in the spatial resolution is obtained compared to an ordinary BOCDA system under the same modulation parameters, as a result of the improved dynamic range by the suppression of background noises... - Bidirectional measurement for Brillouin optical correlation domain analysisJi Ho Jeong
Center for Opto Electronic Convergence Systems, Korea Institute of Science and Technology KIST, Seoul, South Korea
Opt Express 20:11091-6. 2012.... - Variable-frequency lock-in detection for the suppression of beat noise in Brillouin optical correlation domain analysisJi Ho Jeong
Nanophotonics Center, Korea Institute of Science and Technology KIST, Seoul, Korea
Opt Express 19:18721-8. 2011....