中国物理B ›› 2000, Vol. 9 ›› Issue (5): 359-367.doi: 10.1088/1009-1963/9/5/009

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DIFFUSION PARAMETERS DEPENDENT OSCILLATION CHARACTERISTICS IN Ti-DIFFUSED Nd:LiNbO3 CHANNEL WAVEGUIDE LASER

张德龙, 陈才和, 丁桂兰   

  1. Department of Opto-Electronics Information Engineering, College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; State Key Laboratory of Opto-Electronic Information Science and Technology, Ministry of Ed
  • 收稿日期:1999-08-28 出版日期:2000-05-15 发布日期:2005-06-12
  • 基金资助:
    Project supported by 21st Century Youth Natural Science Foundation of Tianjin, China (Grant No. 963700911).

DIFFUSION PARAMETERS DEPENDENT OSCILLATION CHARACTERISTICS IN Ti-DIFFUSED Nd:LiNbO3 CHANNEL WAVEGUIDE LASER

Zhang De-long (张德龙), Chen Cai-he (陈才和), Ding Gui-lan (丁桂兰)   

  1. Department of Opto-Electronics Information Engineering, College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; State Key Laboratory of Opto-Electronic Information Science and Technology, Ministry of Education, Tianjin 300072, China
  • Received:1999-08-28 Online:2000-05-15 Published:2005-06-12
  • Supported by:
    Project supported by 21st Century Youth Natural Science Foundation of Tianjin, China (Grant No. 963700911).

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摘要： The TM mode size, effective refractive index, effective pump area and coupling efficiency between pump and laser modes as function of Ti-stripe initial width W, diffusion temperature T and Ti-stripe initial thickness H in c-cut Ti-diffused Nd:LiNbO3 waveguide laser have been theoretically investigated using variational method. The main features of the mode sizes in terms of these diffusion parameters were collected and compared with the published experimental results, a qualitative agreement has been obtained. The effective pump area, being proportional to threshold pump power, reveals weak dependences on both W and H in the considered respective ranges 4-16 μm and 40-160 nm, and a strong dependence on T(950-1100℃); while the coupling efficiency relative to slope efficiency hardly changes (with values 0.82-0.85) with these parameters.

Abstract: The TM mode size, effective refractive index, effective pump area and coupling efficiency between pump and laser modes as function of Ti-stripe initial width W, diffusion temperature T and Ti-stripe initial thickness H in c-cut Ti-diffused Nd:LiNbO3 waveguide laser have been theoretically investigated using variational method. The main features of the mode sizes in terms of these diffusion parameters were collected and compared with the published experimental results, a qualitative agreement has been obtained. The effective pump area, being proportional to threshold pump power, reveals weak dependences on both W and H in the considered respective ranges 4-16 μm and 40-160 nm, and a strong dependence on T (950-1100℃); while the coupling efficiency relative to slope efficiency hardly changes (with values 0.82-0.85) with these parameters.

中图分类号:  (Doped-insulator lasers and other solid state lasers)

  • 42.55.Rz
42.60.By (Design of specific laser systems) 42.60.Jf (Beam characteristics: profile, intensity, and power; spatial pattern formation) 42.60.Lh (Efficiency, stability, gain, and other operational parameters) 42.70.Hj (Laser materials)