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近年来发表学术论文100余篇,其中SCI和EI同时收录论文近100篇。
Selected Publications (1993-2010):
Year 2011
1. De-Long Zhang, Li Qi, Ping-Rang Hua and Edwin Yue-Bun Pun, Judd-Ofelt spectroscopic study of Er : In : LiNbO3 crystals for integrated optics, Journal of the American Ceramic Society, Inpress.
2. De-Long Zhang, S. Y. Xu, P. R. Hua, D. Y. Yu and E. Y. B. Pun, Emission and absorption cross sections of photorefractive-damage-resistant locally Er-Mg-doped near-stoichiometric Ti : Mg : Er : LiNbO3 strip waveguides, IEEE Journal of Quantum Electronics, In press.
3. De-Long Zhang, Li-Rong Xu, Ping-Rang Hua, Dao-Yin Yu and Edwin Yue-Bun Pun, Concentration determination of Er3+ in LiNbO3 crystal by absorption spectroscopy, Journal of the American Ceramic Society, Inpress.
4. De-Long Zhang,Bei Chen, Li Qi, Ping-Rang Hua, Dao-Yin Yu, Edwin Yue-Bun Pun, Influence of Li-rich vapor transport equilibration on surface refractive index and Mg concentration of MgO (5 mol%)-doped LiNbO3 crystal, Applied Physics B, Inpress.
5. De-Long Zhang, Li Qi, Ping-Rang Hua, Juan-Antonio Vallés, Dao-Yin Yu and Edwin Yue-Bun Pun, Emission and Absorption Cross Section Spectra of Er3+ in Congruent LiNbO3 Crystals Codoped with Indium, Journal of Materials Research, Inpress.
Year 2010
6. De-Long Zhang, Chang Wu and E. Y. B. Pun, Near-stoichiometric Ti:LiNbO3 strip waveguide with varied substrate refractive index in waveguide layer, Chinese Physics B, Vol. 19, No. 2, Art. 024214 (2010).
7. De-Long Zhang, Li-Zhu Zhang, Chao Xu, Liang Sun, Yu-Heng Xu and E. Y. B. Pun, Influence of MgO-codoping on Er concentration in congruent LiNbO3 crystal: Mg threshold concentration effect, Journal of Materials Research, Vol. 25, No. 2, 235-239 (2010).
8. De-Long Zhang, Hui Zheng and Ping-Rang Hua, and Edwin Yue-Bun Pun, Post-grown Li-rich vapor-transport-equilibration inced Mg diffusion within MgO : LiNbO3 crystal, Journal of Materials Research, Vol. 25, No. 9, 1817-1821 (2010).
9. De-Long Zhang,Ping-Rang Hua, Xiao-Xi Liu and E. Y. B. Pun, Li-deficient, off-congruent MgO:LiNbO3 crystals prepared by post-grown Li-poor vapor transport equilibration for integrated optics, Journal of the American Ceramic Society, Vol. 93, No. 7, 1991-1998 (2010).
10. De-Long Zhang, Hui Zheng and Edwin Yue-Bun Pun, Judd-Ofelt spectroscopic study of Mg/Er-codoped near-stoichiometric LiNbO3 crystals for integrated optics, Journal of Materials Research, Vol. 25, No. 11, 2101-2110 (2010).
11. Ping-Rang Hua, De-Long Zhangand E. Y. B. Pun, Photorefractive-Damage-Resistant Locally Er–Mg-Doped Near-Stoichiometric Ti :Mg : Er : LiNbO3 Strip Waveguides: A Way Towards New Devices, IEEE Photonics Technology Letters, Vol. 22, No. 13, 1008-1010 (2010).
12. De-Long Zhang, Pei Zhang, Hao-Jiang Zhou, Yu-Ming Cui and E. Y. B. Pun, Surface Etching of MgO:LiNbO3 Crystal by Ti Metal for Integrated Optics, Journal of the Electrochemical Society, Vol. 157, No. 9, D486-D492 (2010).
13. De-Long Zhang, Jian Gao, Juan-Antonio Vallés, Chao Xu, Liang Sun, Yu-Heng Xu, and Edwin Yue-Bun Pun, Emission and absorption cross sections of optical-damage-resistant Mg/Er-codoped near-stoichiometric LiNbO3 crystals, IEEE Journal of Quantum Electronics, Vol. 46, No. 9, 1332-1341 (2010).
14. De-Long Zhang, Zhen Wang, Bei Chen, Ping-Rang Hua and Edwin Yue-Bun Pun, Influence of post-grown Li-rich and Li-poor vapor transport equilibration on composition, OH- absorption and optical damage threshold of Mg (5 mol%) : LiNbO3 crystals, Applied Physics A-Materials Science & Processing, Vol. 100, No. 4, 1073-1081 (2010).
15. De-Long Zhang, Ping-Rang Hua, Bei Chen, and Edwin Yue-Bun Pun, SIMS study of photorefractive-damage-resistant locally Er/Mg-doped near-stoichiometric Ti:Mg:Er:LiNbO3 strip waveguides, Journal of Materials Research, Vol. 25, No. 9, 1822-1832 (2010).
16. De-Long Zhang, Bei Chen and Edwin Yue-Bun Pun, Locally Er-doped high-solubility LiNbO3 crystal prepared by Li-poor vapor transport equilibration and Er co-diffusion, Journal of the American Ceramic Society, Vol. 93, No. 11, 3837-3841 (2010).
17. Ping-Rang Hua, De-Long Zhangand E. Y. B. Pun, Long Period Grating on Strip Ti : LiNbO3 Waveguide Embedded in Planar Ti : LiNbO3 Waveguide, IEEE Photonics Technology Letters, Vol. 22, No. 18, 1361-1363 (2010).
18. D. L. Zhang, B. Chen, P. R. Hua, D. Y. Yu and E. Y. B. Pun, Demonstration of diffusivity and solubility exaltation of Er3+ in off-congruent, Li-deficient LiNbO3 crystal, Accepted for publication in Journal of Materials Research.
Year 2009
19. De-Long Zhang, Ping-Rang Hua, Qing-Zhong Yang, Hong-Li Liu, Yu-Ming Cui and E. Y. B. Pun, Diffusivity of Er3+ into LiNbO3 as a function of stoichiometry, Journal of Applied Physics, Vol. 105, 023514 (2009).
20. De-Long Zhang, Qing-Zhong Yang, Ping-Rang Hua, Hong-Li Liu, Yu-Ming Cui, Liang Sun, Yu-Heng Xu and E. Y. B. Pun, Sellmeier equation for doubly Er/Mg-doped congruent LiNbO3 crystals, Journal of the Optical Society of America B-Optical Physics, Vol. 26, No. 4, 620-626 (2009).
21. De-Long Zhang, Chang Wu, Qing-Zhong Yang, Liang Sun, Yu-Heng Xu, and E. Y. B. Pun, Transient characteristics of green upconversion emission of Er3+ in MgO:LiNbO3 crystal: Mg threshold concentration effect, Applied Physics B-Lasers and Optics, Vol. 95, No. 2, 335 (2009).
22. De-Long Zhang, Ping-Rang Hua and E. Y. B. Pun, OHˉ absorption in off-congruent LiNbO3 crystals prepared by Li-poor vapor transport equilibration, Optical Materials, Vol. 31, No. 8, 1256 (2009).
23. De-Long Zhang, Bei Chen, Hong-Li Liu, Yu-Ming Cui and E. Y. B. Pun, Emission characteristics, crystalline phase and composition of vapor-transport-equilibrated Er:LiNbO3 crystal codoped with 6 mol% MgO, Applied Surface Science, Vol. 255, 6930 (2009).
24. De-Long Zhang, Ping-Rang Hua and E. Y. B. Pun, Near-stoichiometric Ti:LiNbO3 strip waveguides fabricated by standard Ti diffusion and post-VTE, IEEE Photonics Technology Letters, Vol. 21, No. 22, 1665 (2009).
25. De-Long Zhang, Yi-Peng Wang, Ping-Rang Hua, Qing-Zhong Yang, Wen-Jun Zhang, Qi-Shen Jia, Hong-Li Liu, Yu-Ming Cui, E. Y. B. Pun, Locally Er-doped near-stoichiometric LiNbO3 Crystals prepared by standard Er diffusion and post-VTE treatment, Journal of the American Ceramic Society, Vol. 92, No. 8, 1739 (2009).
26. De-Long Zhang, Bei Chen, Ping-Rang Hua, Liang Sun, Yu-Heng Xu and Edwin Yue-Bun Pun, Secondary ion mass spectrometry study of Ti4+ diffusion properties in congruent Er:LiNbO3 codoped with moderate concentration of MgO, Journal of Materials Research, Vol. 24, No. 10, 3057-30 (2009).
Year 2008
27. De-Long Zhang, Pei Zhang, W. H. Wong, and E. Y. B. Pun, Locally Er-doped near-stoichiometric LiNbO3 crystal for integrated optics, Crystal Growth & Design, Vol. 8, No. 7, 2121 (2008).
28. Ping-Rang Hua, De-Long Zhang, and Yu-Ming Cui Yu-Fang Wang, and E. Y. B. Pun, Off-congruent LiNbO3 crystals prepared by Li-poor vapor transport equilibration for integrated optics, Crystal Growth & Design, Vol. 8, No. 7, 2125 (2008).
29. De-Long Zhang, Ping-Rang Hua, E. Y. B. Pun, Liang Sun and Yu-Heng Xu, Emission characteristics of Er3+ in vapor-transport-equilibrated Er/Zn-codoped LiNbO3 crystals, Journal of Luminescence, Vol. 128, No. 10, 1709 (2008).
30. De-Long Zhang, Qing-Zhong Yang and E. Y. B. Pun, Proposals for fabrication of long-period grating in LiNbO3 strip waveguides, Chinese Physics Letters, Vol. 25, No. 8, 2904 (2008).
31..De-Long Zhang, Pei Zhang, Hao-Jiang Zhou and E. Y. B. Pun, Characterization of near-stoichiometric Ti: LiNbO3 strip waveguides with varied substrate refractive index in the guiding layer, Journal of the Optical Society of America A-OPTICS IMAGE SCIENCE AND VISION, Vol. 25, No. 10, 2558 (2008).
32. Yun Zhang, De-Long Zhang and E. Y. B. Pun, Analysis of temperature/pressure sensitivity of the resonant wavelength of long-period channel waveguide gratings, Journal of the Optical Society of America A-OPTICS IMAGE SCIENCE AND VISION, Vol. 25, No. 11, 2776 (2008).
33. De-Long Zhang, Ping-Rang Hua, Liang Sun, Yu-Heng Xu and E. Y. B. Pun, Vapor transport equilibration-inced formation of micron-sized ErNbO4 precipitates in Zn/Er-codoped LiNbO3 crystals, Materials Science & Engineering C-Biomimetic and Supramolecular Systems, Vol. 28, No. 8, 12 (2008).
Year 2007
34. De-Long Zhang, Comment on “Demonstration of net gain at 1550 nm in an erbium-doped polymer single mode rib waveguide” [Appl. Phys. Lett. , 141124, 2006], Appl. Phys. Lett., Vol. 91, No.10, Art. No. 106101 (2007).
35. De-Long Zhang, Wen-Jun Zhang, Yu-Ran Zhuang, and E. Y. B. Pun, Dynamic simulation of vapor transport equilibration in congruent LiNbO3 crystal, Crystal Growth & Design, Vol. 7, No. 8, 1541 (2007).
36. De-Long Zhang, Ping-Rang Hua, and E. Y. B. Pun, Er3+ diffusion in congruent LiNbO3 crystal doped with 4.5 mol% MgO, Journal of Applied Physics, Vol. 101, No. 11, Art. No. 113513 (2007).
37. De-Long Zhang, Qi-Shen Jia, Ping-Rang Hua, Pei-Zhang, Wen-Jun Zhang, Qing-Zhong Yang, Hong-Li Liu, and Yu-Ming Cui, and E. Y. B. Pun, Er3+ diffusion in congruent LiNbO3 crystal in Li-enriched atmosphere, Journal of Applied Physics, Vol. 102, No. 7, Art. No. 073525 (2007).
38. De-Long Zhang, Yu-Ran Zhuang, Ping-Rang Hua and E. Y. B. Pun, Simulation of Ti-diffusion into LiNbO3 in Li-rich atmosphere, Journal of Applied Physics,Vol. 101, No. 1, Art. No. 013101 (2007).
39. De-Long Zhang, Ping-Rang Hua, Yu-Heng Xu and E. Y. B. Pun, Judd-Ofelt analysis of spectroscopic property of Er3+ in congruent and near-stoichiometric Zn/Er-codoped LiNbO3 crystals, Journal of Applied Physics, Vol. 101, No. 5, Art. No. 053523 (2007).
40. De-Long Zhang, Ping-Rang Hua, and E. Y. B. Pun, Correct determination of internal gain and net gain in Er-doped optical waveguide amplifier from pump-on/off measurement, Optics Communications, Vol. 279, No. 1, (2007).
41. De-Long Zhang, Z. Yang, W. H. Wong and E. Y. B. Pun, Second-ion-mass spectrometry study on ?near-stoichiometric LiNbO3 strip waveguide fabricated by vapour transport equilibration and Ti co-diffusion, Philosophical Magazine, Vol. 87, No.1, 63 (2007).
42. De-Long Zhang, Jia Kang, and E. Y. B. Pun, X-ray diffraction, optical absorption and emission studies on Er3+- and Er3+/Yb3+ doped Li3NbO4 powder, Journal of Materials Science, Vol. 42, No. 13, 4731 (2007).
43. De-Long Zhang, Yun Zhang, and E. Y. B. Pun, Long Period Grating in/on Planar and Channel Waveguides: A Theory Description, Optics and Laser Technology, Vol 39, No. 6, 1204-1213 (2007).
44. De-Long Zhang, Ping-Rang Hua, E. Y. B. Pun and G. G. Siu, X-ray, micro-Raman, optical absorption and emission studies on ErNbO4 precipitates grown on surface of bulk and locally Er-doped LiNbO3 crystals by vapor transport equilibration, Journal of the American Ceramic Society, Vol. 90, No. 9, 23-29(2007)??
45. De-Long Zhang, Ping-Rang Hua, Yu-Ming Cui, Cai-He Chen and E. Y. B. Pun, Absorption and emission properties of Er3NbO7 powder: A comparison with ErNbO4 powder and Er:LiNbO3 crystal, Journal of Luminescence, Vol. 127, No. 2, 453 (2007).
Year 2006
46. De-Long Zhangand E. Y. B. Pun, Emission characteristics of near-stoichiometric Er/Yb-codoped LiNbO3 crystals, Journal of Applied Physics, Vol. 99, No. 2, Art. No. 023101 (2006).
47. De-Long Zhang,Rui Ma and E. Y. B. Pun, Optical Absorption characteristics in thermally reced Er:LiNbO3 crystals, Optical Materials,Vol.28, No.4, 453 (2006).
48. De-Long Zhang, Jin Zhang, Zhong-Kang Wu, and E. Y. B. Pun, Light-inced absorption in strongly reced congruent and nearly-stoichiometric Er:LiNbO3 crystals, Applied Physics A-Materials Science & Processing, Vol. 83, No. 3, 397 (2006).
49. M. Dammak, De-Long Zhang, Spectra and energy levels of Er3+ in Er2O3 powder, Journal of Alloys and Compounds, Vol. 407, No. 1-2, 8 (2006).
Year 2005
50. De-Long Zhangand E. Y. B. Pun, Comment on “1.5 μm emission characteristics of Er3+-doped stoichiometric LiNbO3” [Appl. Phys. Lett. 85, 4367 (2004)], Applied Physics Letters, Vol. 86, No. 26, Art. No. 266101 (2005).
51. De-Long Zhang,Dun-Chun Wang and E. Y. B. Pun, Numerical Analysis of Optical Amplification in Er3+/Yb3+ co-doped Ti: LiNbO3 Strip Waveguides, IEEE Journal of Quantum Electronics, Vol. 41, No. 7, 958 (2005).??
52. De-Long Zhang,Dun-Chun Wang and E. Y. B. Pun, Influence of vapor transport equilibration on spectroscopic properties of Er:LiNbO3 crystal heavily codoped with MgO, Journal of Applied Physics, Vol. 97, No. 10, Art. No. 103524 (2005).
53. De-Long Zhang, Dun-Chun Wang and E. Y. B. Pun, Influence of vapor transport equilibration on spectroscopic parameters of Er3+ in LiNbO3 crystals, Physica Status Solidi a-Applications and Materials Science, Vol. 202, No. 6, 1102 (2005).
54. D. –L. Zhang, J. Zhang, Y. -F. Wang, D. -S. Zhu, Z. -K. Wu, and E. Y. B. Pun, Light-inced absorption instability in weakly reced congruent Er:LiNbO3 crystal, Applied Physics A-Materials Science & Processing, Vol. 80, No.8, 1819 (2005).
55. De-Long Zhang, J. Zhang, Y. F. Wang and E. Y. B. Pun, Raman Scattering Study of Reced Er:LiNbO3 Crystals, Applied Physics A-Materials Science & Processing, Vol. 81, No.5, 1009 (2005).
56. De-Long Zhang, G. G. Siu, and E. Y. B. Pun, Microscope Raman scattering and x-ray diffraction study of near-stoichiometric Ti:LiNbO3 waveguides, Physica Status Solidi a-Applications and Materials Science, Vol. 202, No.13, 2521 (2005).
57. De-Long Zhang, Yu-Ran Zhuang, Jin Zhang, Zhong-Kang Wu, and E. Y. B. Pun, Light-inced diffraction from strongly-reced Er:LiNbO3 crystals, Journal of Modern Optics, 52, No.15, 2105 (2005).
Year 2004
58. De-Long Zhang, W. H. Wong and E.Y. B. Pun, Optimized lift-off technique for deposition of Ti-strip on LiNbO3 crystal, Journal of Vacuum Science & Technology B, Vol. 22, No.1, 283 (2004).
59. De-Long Zhang, and E. Y. B. Pun, Modification of stretched-exponentially dependent depopulation dynamics of small polaron in Fe:LiNbO3 crystals, Journal of Applied Physics, Vol. 95, No.7, 3437 (2004).
60. De-Long Zhang, Yu-Fang Wang, E. Y. B. Pun, Yi-Zhong Yu, Cai-He Chen and Jian-Quan Yao, Absorption and Emission of ErNbO4 Powder, Optical Materials, Vol.25, No.4, 379 (2004).
61. De-Long Zhangand E. Y. B. Pun, X-ray diffraction study on formation of ErNbO4 powder, Journal of Alloys and Compounds, Vol. 370, No.1-2, 315 (2004).
62. De-Long Zhang, Dun-Chun Wang, Yu-Fang Wang and E. Y. B. Pun, Raman Scattering Study on Formation of ErNbO4 Powder, Physica Status Solidi a-Applications and Materials Science,Vol. 201, No. 10, 2334 (2004).
63. De-Long Zhang, W. H. Wong and E. Y. B. Pun, Near-stoichiometric Ti:LiNbO3 waveguides fabricated using vapor transport equilibration and Ti co-diffusion, Applied Physics Letters, Vol. 85, No.15, 3002 (2004).
. De-Long Zhang, W. H. Wong and E.Y. B. Pun, SEM characterization of micron-sized ErNbO4 precipitates inced in highly-doped Er:LiNbO3 crystal by vapor transport equilibration, Journal of Crystal Growth, Vol. 271, No.1-2, 184 (2004).
65. De-Long Zhang, W. H. Wong and E. Y. B. Pun, Characterization of vapor-transport-equilibrated Yb(/Er):LiNbO3 crystals, Journal of Physics-Condensed Matter, Vol. 16, No.43, 7793 (2004).
66. B. Wu, C. H. Chen, G. L. Ding, D. L. Zhangand Y. M. Cui, Hybrid-integrated Michelson fiber optic accelerometer, Optical Engineering, Vol. 43, No. 2, 313 (2004).
Year 2003
67. De-Long Zhangand E. Y. B. Pun, Emission Characteristics of Vapor Transport Equilibrated Er:LiNbO3 Crystals, Journal of Applied Physics, Vol.93, No. 6, 3141 (2003).
68. De-Long Zhangand E. Y. B. Pun, Origin of vapor transport equilibration inced formation of nanocrystalline ErNbO4 in Er:LiNbO3 crystal, Journal of Applied Physics, Vol.94, No.2, 1178 (2003).
69. De-Long Zhang, and E. Y. B. Pun, Accurate measurement of 1.5 μm lifetime of Er3+ in LiNbO3 crystals, Journal of Applied Physics, Vol. 94, No. 3, 1339 (2003).
70.Xiang Zhou, De-Long Zhang,Yun Zhang, Gui-Lan Ding and Cai-He Chen, Theortical Study of Ti:LiNbO3 Strip Waveguides in the Mid-infrared, Journal of Modern Optics, 50, No.14, 2191 (2003).
Year 2002
71. De-Long Zhang, E. Y. B. Pun, Xiao-Jun. Chen, Yue-Han Jin, Deng-Song Zhu and Zhong-Kang Wu, Absorption Characteristics of Vapor Transport Equilibrated Er:LiNbO3 Crystals, Journal of Applied Physics, Vol. 91, No.7, 4014 (2002).
72. D. Zhang, G. Lan, X. Chen and D. Zhu, X-ray Diffraction Study on Precipitate of Er:LiNbO3 Inced by Vapor Transport Equilibration, Applied Physics A-Material Science & Processing, Vol.74, No.2, 265 (2002).
73. Delong Zhang, Xiaojun Chen, Yufang Wang, Dengsong Zhu, Bo Wu, Caihe Chen, Guoxiang Lan, Influence of Vapor Transport Equilibration on Raman Spectra of Er:LiNbO3 Crystals, Journal of Physics and Chemistry of Solids, Vol.63, No.2, 345 (2002). ?
74. De-Long Zhang, Bo Wu, Variational Analysis of Er:Ti:LiNbO3 Waveguide Lasers Based on Gaussian/Two-half Gaussian Mode Field Distribution, Optics and Laser Technology, Vol.34, No.1, 69 (2002).
Year 2001
75. Delong Zhang, Yuanguo Xie, Guilan Ding, Yuming Cui and Caihe Chen, A Comparative Analysis of TE and TM Guided-modes in Ti-diffused Er:LiNbO3 Waveguide Laser, Journal of Modern Optics, Vol.48, No.4, 703 (2001).
76. D. Zhang, X. Chen, Y. Jin, X. Cao, D. Zhu, Y. Wang, G. Ding, Y. Cui, C. Chen, Z. Wu and G. Lan, Raman Study on Vapor Phase Equilibrated Er:LiNbO3 and Er:Ti:LiNbO3 Crystals, Applied Physics A-Materials Science & Processing, Vol.72, No.1, 95 (2001).
77. Delong Zhang, Bo Wu, Yuanguo Xie, Guilan Ding, Yuming Cui and Caihe Chen, Theoretical Study of Annealed Proton-exchanged Nd:LiNbO3 Channel Waveguide Lasers with Variational Method, IEEE/OSA Journal of Lightwave Technology, Vol.19, No.10, 1560 (2001).
Year 2000
78. De-Long Zhang, Caihe Chen and Guilan Ding, Diffusion Parameters Dependent OscillationCharacteristics in Ti-diffused Nd:LiNbO3 Channel Waveguide Laser, Chinese Physics, Vol.9, No.5, 359 (2000).
79. D. Zhang, C. Chen and G. Ding, Oscillation Characteristics Analysis of Transversely and Coaxially pumped Ti-diffused Nd:MgO:LiNbO3 waveguide lasers, Journal of Modern Optics, Vol.47, No.4, 613 (2000).
80. Delong Zhang, Guilan Ding and Caihe Chen, Fabrication Parameters Optimization of Ti-diffused Nd:MgO:LiNbO3 Channel Waveguide Lasers, Journal of Modern Optics, Vol.47, No.10, 1623 (2000).
Before 2000
81. Caihe Chen, Delong Zhangand Guilan Ding, Broadband Michelson Fiberoptic Accelerometer, Applied Optics, Vol.38, No.4, 628 (1999).
82. Caihe Chen, Guilan Ding, Delong Zhang, Yuming Cui, and Shuqing Li, Michelson Fiberoptic Accelerometer, Review of Scientific Instruments, Vol.69, No.9, 3123 (1998).
83. Delong Zhang, Guilan Ding and Caihe Chen, Theoretical Analysis of Guided Mode and Effective Refractive Index at 1.53 μm in Ti-diffused LiNbO3 Waveguide, IEEE/OSA J. Lightwave Technology, Vol.16, No.3, 459 (1998).
84. Delong Zhang, Caihe Chen, Guilan Ding, Junli Zhang and Yuming Cui, Dependence of Ti-diffused Er:LiNbO3 Laser Efficiency on Waveguide Fabrication Parameters and Pump Wavelength, IEEE J. Quantum Electron.,Vol.33, No.7, 1231 (1997).
85. Delong Zhang, Caihe Chen, Jiang Li, Guilan Ding, Xiaojun Chen, and Yuming Cui, A Theoretical Study of Ti-diffused Er:LiNbO3 Waveguide Laser, IEEE J. Quantum Electron., Vol.32, No.10, 1833 (1996).