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S. Y. Choi

 
Choi, Sun Young (최선영)
 
Ajou University, Department of Physics & Division of Energy Systems Research
Ph.D. : AJou University, Applied physics, 2015
M. S. : AJou University, Applied physics, 2010
B. S. : Ajou University, Physics, 2008
Research area : CNT & graphene saturable absorbers, ultrafast compact lasers
E-mail : psyturtle[at]kaist.ac.kr

 
Publications
 
Journals
  1. J. W. Kim, S. Y. Choi, W. T. Kim, B. J. Kang, W. B. Cho, G.-H. Kim, F. Rotermund, "550-MHz carbon nanotube mode-locked femtosecond Cr:YAG laser," Chin. Opt. Lett. 16, 061404 (2018). (journal cover)
  2. S. Y. Choi, T. Calmano, F. Rotermund, C. Kränkel, "2-GHz carbon nanotube mode-locked Yb:YAG channel waveguide laser," Opt. Express 26, 5140 (2018).
  3. E. Kifle, X. Mateos, P. Loiko, S.Y. Choi, J. E. Bae, F. Rotermund, M. Aguilo, F. Diaz, U. Griebner, V. Petrov, “Tm:KY1-x-yGdxLuy(WO4)2 planar waveguide laser passively Q-switched by single-walled carbon nanotubes,”Opt. Express 26, 4961 (2018).
  4. K. J. Ahn, J. Y. Gwak, B. J. Lee, S. Y. Choi, M. H. Kim, I. H. Baek, Y. U. Jeong, and F. Rotermund, “Wavelength and fluence dependent third-order optical nonlinearity of mono-and multi-layer graphene,” Appl. Opt. 56, 9920 (2017).
  5. C. Kim, D. Kwon, D. Kim, S. Y. Choi, S. J. Cha, K. S. Choi, D.-I. Yeom, F. Rotermund, and J. Kim, “Robust, low-noise, polarization-maintaining mode-locked Er-fiber laser with a planar lightwave circuit (PLC) device as a multi-functional element,” Opt. Lett. 42, 1472 (2017).
  6. P. Loiko, J. M. Serres, X. Mateos, M. Aguiló, F. Díaz, L. Zhang, Z. Lin, H. Lin, G. Zhang, K. Yumashev, V. Petrov, U. Griebner, Y. Wang, S. Y. Choi, F. Rotermund, and W. Chen, “Monoclinic Tm3+:MgWO4: al promising crystal for continuous-wave and passively Q-switched lasers at ~ 2 µm,” Opt. Lett. 42, 1177 (2017).
  7. I. H. Baek, J. M. Hamm, K. J. Ahn, B. J. Kang, S. S. Oh, S. Bae, S. Y. Choi, B. H. Hong, D.-I. Yeom, B. Min, O. Hess, Y. U. Jeong, and F. Rotermund, “Boosting the terahertz nonlinearity of graphene by orientation disorder,” 2D Mater. 4, 025035 (2017).
  8. E. Kifle, X. Mateos, J. R. Vazquez De Aldana, A. Rodenas, P. Loiko, S. Y. Choi, F. Rotermund, U. Griebner, V. Petrov, M. Aguilo, F. Diaz, “Femtosecond-laser-written Tm:KLu(WO4)2 waveguide lasers,” Opt. Lett. 42, 1177 (2017).
  9. K. N. Gorbachenya, V. E. Kisel, A. S. Yasukevich, M. B. Prudnikova, V. V. Maltsev, N. I. Leonyuk, S. Y. Choi, F. Rotermund, N. V. Kuleshov, “Passively Q-switched Er,Yb:GdAl3(BO3)4 laser with single-walled carbon nanotube based saturable absorber,” Laser Phys. Lett. 14, 035802 (2017).
  10. J. Ko, H. Jeong, S. Y. Choi, F. Rotermund, D.-I. Yeom, B. Y. Kim, “Single-walled carbon nanotubes on side polished fiber as a universal saturable absorber for various laser output states,” Cur. Appl. Phys. 17, 37 (2017).
  11. P. Loiko, X. Mateos, S. Y. Choi, F. Rotermund, J. M. Serres, M. Aguilo, F. Diaz, K. Yumashev, U. Griebner, V. Petrov, “Vibronic thulium laser at 2131 nm Q-switched by single-walled carbon nanotubes,” J. Opt. Soc. Am. B 33, D19 (2016).
  12. J. Gene, N. H. Park, H. S. Jeong, S. Y. Choi, F. Rotermund, D.-I. Yeom, B. Y. Kim, “Optically controlled in-line graphene saturable absorber for the manipulation of pulsed fiber laser operation,” Opt. Express 24, 12301 (2016).
  13. W. B. Cho, S. Y. Choi, C. Zhu, M. H. Kim, J. W. Kim, J. S. Kim, H. J. Park, D. H. Shin, M. Y. Jung, F. Wang, F. Rotermund, “Graphene mode-locked femtosecond Cr2+:ZnS laser with ~300 nm tuning range,” Opt. Express 24, 20774 (2016).
  14. H. Jeong, S. Y. Choi, F. Rotermund, K. Lee, and D.-I. Yeom, “All-Polarization Maintaining Passively Mode-Locked Fiber Laser Using Evanescent Field Interaction With Single-Walled Carbon Nanotube Saturable Absorber,” J. Lightwave Technol. 34, 3510 (2016).
  15. M. H. Kim, T. Calmano, S. Y. Choi, B. J. Lee, I. H. Baek, K. J. Ahn, D.-I. Yeom, C. Kränkel, F. Rotermund, “Monolayer graphene coated Yb:YAG channel waveguides for Q-switched laser operation,” Opt. Mater. Express 6, 2468 (2016).
  16. H. Jeong, S. Y. Choi, M. H. Kim, F. Rotermund, Y.-H. Cha, D.-Y. Jeong, S. B. Lee, K. Lee, and D.-I. Yeom, "All-fiber Tm-doped soliton laser oscillator with 6 nJ pulse energy based on evanescent field interaction with monolayer graphene saturable absorber," Opt. Express 24, 14153 (2016).
  17. R. Lan, P. Loiko, X. Mateos, Y. Wang, J. Li, Y. Pan, S. Y. Choi, M. H. Kim, F. Rotermund, A. Yasukevich, K. Yumashev, U. Griebner, and V. Petrov, "Passive Q-switching of microchip lasers based on Ho:YAG ceramics," Appl. Opt. 55, 4877 (2016).
  18. C. Kim, D. Kim, Y.J. Cheong, D. Kwon, S. Y. Choi, H. Jeong, S. J. Cha, J.-W. Lee, D.-I. Yeom, F. Rotermund, and J. Kim, "300-MHz-repetition-rate, all-fiber, femtosecond laser mode-locked by planar lightwave circuit-based saturable absorber," Opt. Express 23, 26234 (2015).
  19. N. H. Park, H. Jeong, S. Y. Choi, M. H. Kim, F. Rotermund, and D.-I. Yeom, "Monolayer graphene saturable absorbers with strongly enhanced evanescent-field interaction for ultrafast fiber laser mode-locking," Opt. Express 23, 19806 (2015).
  20. E. J. Lee+, S. Y. Choi+, H. Jeong+, N. H. Park, W. Yim, M. H. Kim, J.-K. Park, S. Son, S. Bae, S. J. Kim, Y. H. Ahn, K. J. Ahn, B. H. Hong, J.-Y. Park, F. Rotermund*, D.-I. Yeom*, "Active control of all-fibre graphene devices with electrical gating," Nature Commun. 6, 6851 (2015).
  21. S. Y. Choi, T. Calmano, M. H. Kim, D.-I. Yeom, C. Kränkel, G. Huber, F. Rotermund, "Q-switched operation of a femtosecond-laser-inscribed Yb:YAG channel waveguide laser using carbon nanotubes," Opt. Express 23, 7999 (2015).
  22. J. W. Kim, S. Y. Choi, S. Aravazhi, M. Pollnau, U. Griebner, V. Petrov, S. Bae, K. J. Ahn, D.-I. Yeom, F. Rotermund, "Graphene Q-switched Yb:KYW planar waveguide laser," AIP Adv. 5, 017110 (2015).
  23. V. Aleksandrov, A. Gluth, V. Petrov, I. Buchvarov, S. Y. Choi, M. H. Kim, F. Rotermund, X. Mateos, F. Diaz, and U. Griebner, "Tm,Ho:KLu(WO4)2 laser mode-locked near 2 μm by single-walled carbon nanotubes," Opt. Express 22, 26872 (2014).
  24. H. Jeong, S. Y. Choi, F. Rotermund, Y.-H. Cha, D.-Y. Jeong, D.-I. Yeom "All-fiber mode-locked laser oscillator with pulse energy of 34 nJ using a carbon nanotube saturable absorber," Opt. Express 22, 22667 (2014).
  25. S. Y. Choi, J. W. Kim, M. H. Kim, D.-I. Yeom, B. H. Hong, X. Mateos, M. Aguilo, F. Diaz, V. Petrov, U. Griebner, F. Rotermund, "Carbon nanostructure-based saturable absorber mirror for a diode-pumped 500-MHz femtosecond Yb:KLu(WO4)2 laser," Opt. Express 22, 15626 (2014).
  26. Y. Zhang, V. Petrov, U. Griebner, X. Zhang, S. Y. Choi, J. Y. Gwak, F. Rotermund, X. Mateos, H. Yu, H. Zhang, J. Liu, "90-fs diode-pumped Yb:CLNGG laser mode-locked using single-walled carbon nanotube saturable absorber," Opt. Express 22, 5635 (2014).
  27. H. Yang, H. Kim, J. Shin, C. Kim, S. Y. Choi, G. H. Kim, F. Rotermund, J. Kim, “Gigahertz repetition rate, sub-femtosecond timing jitter optical pulse train directly generated from a  mode-locked Yb:KYW laser,” Opt. Lett. 39, 56 (2014).
  28. S. Y. Choi, H. Jeong, B. H. Hong, F. Rotermund, D.-I. Yeom, “All-fiber dissipative soliton laser with 10.2 nJ pulse energy using an evanescent field interaction with graphene saturable absorber," Laser Phys. Lett. 11, 015101 (2014).
  29. J. W. Kim, S. Y. Choi, D.-I. Yeom, S. Aravazhi, M. Pollnau, U. Gruebner, V. Petrov, F. Rotermund, "Yb:KYW planar waveguide laser Q-switched by evanescent-field interaction with carbon nanotubes," Opt. Lett. 38, 5090 (2013).
  30. H. Jeong, S. Y. Choi, F. Rotermund, D.-I. Yeom, "Pulse width shaping of passively mode-locked fiber laser via polarization control in carbon nanotube saturable absorber,” Opt. Express 21, 27011 (2013).
  31. S. D. D. D. Cafiso, E. Ugolotti, A. Schmidt, V. Petrov, U. Griebner, A. Agnesi, W. B. Cho, Y. G. Zhang, S. Y. Choi, F. Rotermund, G. Reali, F. Pirzio, "Sub-50-fs mode-locking of the Cr:YAG laser using SWCNT-SA," Laser Phys. Lett. 10, 085801 (2013).
  32. K. Seger, N. Meiser, S. Y. Choi, B. H. Jung, D.-I. Yeom, F. Rotermund, O. Okhotnikov, F. Laurell, V. Pasiskevicius, "Carbon nanotube mode-locked optically-pumped semiconductor disk laser," Opt. Express 21, 17806 (2013).
  33. H. Jeong, S. Y. Choi, E. I. Jeong, S. J. Cha, F. Rotermund, D.-I. Yeom, "Ultrafast mode-locked soliton fiber laser using a waveguide-type saturable absorber based on single-walled carbon nanotubes," Appl. Phys. Express 6, 052705 (2013).
  34. J. W. Kim, S. Y. Choi, B. H. Jung, D.-I. Yeom, F. Rotermund, "Applicability of graphene flakes as saturable absorber for bulk laser mode-locking," Appl. Phys. Express 6, 032704 (2013).
  35. H.-W. Yang, C. Kim, S. Y. Choi, G.-H. Kim, Y. Kobayashi, F. Rotermund, J. Kim, "1.2-GHz repetition rate, diode-pumped femtosecond Yb:KYW laser mode-locked by a carbon nanotube saturable absorber mirror," Opt. Express 20, 29518 (2012).
  36. A. Schmidt, S. Y. Choi, D. -I. Yeom, F. Rotermund, X. Mateos, M. Segura, F. Diaz, V. Petrov, and U. Griebner, "Femtosecond pulses near 2 μm from a Tm:KLuW laser mode-locked by a single-walled carbon nanotube saturble absorber," Appl. Phys. Express, 5, 092704 (2012).
  37. F. Rotermund, W. B. Cho, S. Y. Choi, I. H. Baek, J. H. Yim, S. Lee, A. Schmidt, G. Steinmeyer, U. Griebner, D.-I. Yeom, K. Kim, V. Petrov, "Mode-locking of solid-state lasers by single-walled carbon-nanotube based saturable absorbers," Quantum Electron. 42, 663 (2012).
  38. I. Baylam, S. Ozharar, H. Cankaya, S. Y. Choi, K. Kim, F. Rotermund, U. Griebner, V. Petrov, and A. Sennaroglu, "Energy scaling of a carbon nanotube saturable absorber mode-locked femtosecond bulk laser," Opt. Lett. 37, 3555 (2012).
  39. C. S. Jun, S. Y. Choi, F. Rotermund, B. Y. Kim, and D. -I. Yeom, "Toward higher-order passive harmonic mode-locking of a soliton fiber laser," Opt. Lett. 37, 1862 (2012).
  40. S. Y. Choi, D. K. Cho, Y.-W. Song, K. Oh, K. Kim, F. Rotermund, D.-I. Yeom, "Graphene-filled hollow optical fiber saturable absorber for soliton fiber laser mode-locking," Opt. Express 20, 5652 (2012).
  41. A. Schmidt, P. Koopmann, G. Huber, P. Fuhrberg, S. Y. Choi, D.-I. Yeom, F. Rotermund, V. Petrov, U. Griebner, "175 fs Tm:Lu2O3 laser at 2.07  μm mode-locked using single-walled carbon nanotubes," Opt. Express 20,5313 (2012).
  42. A. Agnesi, A. Greborio, F. Pirzio, G. Reali, E. Ugolotti, S. Y. Choi, F. Rotermund, U. Griebner, V. Petrov, "Femtosecond Nd:glass lasers pumped by single-mode laser diodes and mode-locked with carbon nanotube or semiconductor saturable absorber mirrors," IEEE J. Select. Top. Quant. Electron. 18, 74(2012).
  43. H. Iliev, I. Buchvarov, S. Y. Choi, K. Kim, F. Rotermund, U. Griebner, V. Petrov, "Steady state mode-locking of a 1.34 μm Nd:YVO4 laser with a single-walled carbon nanotube saturable absorber," Appl. Phys. B 206, 1 (2012).
  44. A. Agnesi, F. Pirzio, E. Ugolotti, S. Y. Choi, D.-I. Yeom, F. Rotermund, "Femtosecond single-mode diode-pumped Cr:LiSAF laser mode-locked with single-walled carbon nanotubes," Opt. Commun. 285, 742 (2012).
  45. W. B, Cho, J. W. Kim, H. W. Lee, S. Bae, B. H. Hong, S. Y. Choi, I. H. Baek, K. Kim, D.-I. Yeom, F. Rotermund, "High-quality, large-area monolayer graphene for bulk laser mode-locking near 1.25 μm", Opt. Lett. 36, 4089 (2011).
  46. C. S. Jun, J. H. Im, S. H. Yoo, S. Y. Choi, F. Rotermund, D.-I. Yeom, B. Y. Kim, "Low noise GHz passive harmonic mode-locking of soliton fiber laser using evanescent wave interaction with carbon nanotubes," Opt. Express 19, 19775 (2011).
  47. I. H. Baek, S. Y. Choi, H. W. Lee, W. B, Cho, V. Petrov, A. Agnesi, V. Pasiskevicius, D.-I. Yeom, K. Kim, F. Rotermund, "Single-walled carbon nanotube saturable absorber assisted high-power mode-locking of a Ti:sapphire laser", Opt. Express 19, 7833 (2011).
  48. W. B, Cho, S. Y. Choi, J. W. Kim, D.-I. Yeom, K. Kim, H. Lim, F. Rotermund, "Solid-state laser mode-locking near 1.25 μm employing a carbon nanotube saturable absorber mirror", J. Opt. Soc. Kor. 15, 56 (2011).
  49. A. Agnesi, L. Carra, F. Pirzio, G. Reali, A. Toncelli, M. Tonelli, S. Y. Choi, F. Rotermund, U. Griebner, V. Petrov, "Diode-pumped Nd:BaY2F8 picosecond laser mode-locked with carbon nanotube saturable absorbers," J. Opt. Soc. Am. B 27, 2739 (2010).
  50. A. Agnesi, A. Greborio, F. Pirzio, G. Reali, S. Y. Choi, F. Rotermund, U. Griebner, V. Petrov, "99-fs Nd:glass laser mode-locked with carbon nanotube saturable absorber mirror," Appl. Phys. Express 3, 112702 (2010).
  51. J. H. Im, S. Y. Choi, F. Rotermund, D.-I. Yeom, "All-fiber Er-doped dissipative soliton laser based on evanescent field interaction with carbon nanotube saturable absorber," Opt. Express 18, 22141 (2010).
  52. W. B. Cho, A. Schmidt, S. Y. Choi, V. Petrov, U. Griebner, G. Steinmeyer, S. Lee, D.-I. Yeom, F. Rotermund, "Mode-locking of a Cr:YAG laser with carbon nanotubes," Opt. Lett. 35, 2669 (2010).
  53. W. B, Cho, J. H. Yim, S. Y. Choi, S. Lee, A. Schmidt, G. Steinmeyer, U. Griebner, V. Petrov, D.-I. Yeom, K. Kim, F. Rotermund, "Boosting the nonlinear optical response of carbon nanotube saturable absorbers for broadband mode-locking of bulk lasers", Adv. Funct. Mater. 20, 1937 (2010).
  54. S. H. Bae, I. H. Baek, S. Y. Choi, W. B. Cho, F. Rotermund, C. S. Yoon, "Efficient second-harmonic generation of ultrashort pulses with simultaneous quasi-phase matching and group velocity matching in periodic 90° domain structures of potassium niobate," Opt. Commun. 283, 1894 (2010).
  55. S. Y. Choi, F. Rotermund, H. Jung, K. Oh, D.-I. Yeom, "Femtosecond mode-locked fiber laser employing a hollow optical fiber filled with carbon nanotube dispersion as saturable absorber," Opt. Express 17, 21788 (2009).
  56. A. Schmidt, S. Rivier, W. B. Cho, J. H. Yim, S. Y. Choi, S. Lee, F. Rotermund, D. Rytz, G. Steinmeyer, V. Petrov, U. Griebner, "Sub-100fs single-walled carbon nanotube saturable absorber mode-locked Yb-laser operation near 1 μm," Opt. Express 17, 20109 (2009).
  57. W. B. Cho, A. Schmidt, J. H. Yim, S. Y. Choi, S. Lee, F. Rotermund, U. Griebner, G. Steinmeyer, V. Petrov, X. Mateos, M. C. Pujol, J. J. Carvajal, M. Aguilo, F. Diaz, "Passive mode-locking of a Tm-doped bulk laser near 2 μm using a carbon nanotube saturable absorber," Opt. Express 17, 11007 (2009).
  58. W. B. Cho, J. H. Yim, S. Y. Choi, S. Lee, U. Griebner, V. Petrov, F. Rotermund, "Mode-locked self-starting Cr:forsterite laser using a single-walled carbon nanotube saturable absorber," Opt. Lett. 33, 2449 (2008).
 
Conferences

International Conferences
  1. S. Y. Choi, T. Calmano, F. Rotermund, C. Saraceno, and C. Kränkel, “GHz mode-locked Yb:YAG channel waveguide laser,” Advanced Solid State Lasers Conference (ASSL) 2017, Nagoya, Japan.
  2. S. Y. Choi, F. Rotermund, C. Kränkel, and T. Camano, “Mode-locking of a femtosecond-laser-inscribed Yb:YAG channel waveguide laser using a carbon nanotube saturable absorber,” CLEO/Europe-EQEC 2017, Munich, Germany.
  3. S. Y. Choi, T. Calmano, C. Kränkel, and F. Rotermund, “2 GHz repetition rate, single-walled carbon nanotube mode-locked Yb:YAG channel waveguide lasers in an extended cavity configuration,” The 6th Advanced Lasers and Photon Sources (ALPS) 2017, Yokohama, Japan.
  4. S. Y. Choi, K. N. Gorbachenya, V. E. Kisel, A. S. Yasukevich, V. V. Maltsev, N. I. Leonyuk, N. V. Kuleshov, and F. Rotermund, “Carbon nanotube saturable absorber for passive Q-switching of Er,Yb-doped bulk laser,” The 10th Asia-Pacific Laser Symposium 2016, Jeju, South Korea. 
  5. S. Y. Choi, T. Calmano, M. H. Kim, D.-I. Yeom, C. Kränkel, G. Huber, and F. Rotermund, “Diode-pumped femtosecond-laser-inscribed Yb:YAG channel waveguide lasers, Q-switched by carbon nanotubes,” CLEO/Europe-EQEC 2015, Munich, Germany.
  6. S. Y. Choi, J. W. Kim, M. H. Kim, D.-I. Yeom, B. H. Hong, X. Mateos, M. Aguílo, F. Díaz, V. Petrov, U. Greibner, and F. Rotermund, “Diode-pumped, femtosecond Yb:KLu(WO4)2 laser mode-locked by carbon nanostructure-based saturable absorber mirror,” 3rd Advanced Lasers and Photon Sources 2014 (APLS 2014), Yokohama, Japan.
  7. S. Y. Choi, Y.-W. Song, K. Oh, F. Rotermund, and D.-I. Yeom, “Soliton fiber laser mode-locking using graphene-filled hollow optical fiber,” The 17th Optoelectronic and Communications Conference (OECC’12) 2012, Busan, South Korea.
  8. S. Y. Choi, D. K. Cho, F. Rotermund, Y.-W. Song, K. Oh, and D.-I. Yeom, “Graphene-filled hollow optical fiber for all-fiber laser mode-locking,” IQEC/CLEO Pacific Rim 2011, Sydney, Australia.
  9. S. Y. Choi, F. Rotermund, H. Jung, K. Oh, and D.-I. Yeom, “Passively mode-locked fiber laser incorporating single-walled carbon nanotube-filled hollow optical fiber,” CLEO Pacific Rim 2009, Shanghai, China.
  10. S. Y. Choi, W. B. Cho, J. H. Yim, S. Lee, Y. H. Ahn, K. Kim, H. Lim, and F. Rotermund, “Carbon nanotube saturable absorbers for solid-state laser mode-locking near 1.25 µm,” Nanotube 08 (NT08) (2008), Montpellier, France.
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