Infrared and Laser Engineering, Volume. 51, Issue 4, 20210168(2022)
Influence of the misalignment of the collimating lens on the line-width of Littman-Metcalf grating external cavity laser
Figures & Tables(14)
Fig. 1. Structure diagram of Littman-Metcalf configuration of ECDL
Fig. 3. Relationship between the output linewidth of the laser and length of the external cavity while (a) the reflectivity of laser diode, (b) the diffraction efficiency of blazed grating and (c) the reflectivity of reflecting prism are different
Fig. 4. Influence of coupling efficiency on the output linewidth of the laser
Fig. 5. Schematic diagram of lens tilting (a) and decentering (b) along
Fig. 6. Influence of lens tilted about （a）
Fig. 8. Influence of lens decentered about （a）
Fig. 9. Influence of lens decentered about （a）
Table 1. Relationship between output linewidth and tilt amount of
X -axisView tableView in ArticleTable 1. Relationship between output linewidth and tilt amount of
X -axis0 0.035 0.07 0.105 0.14 ${\eta _x}$ 1 0.392 0.108 0.049 0.024 ${\eta _y}$ 1 0.968 0.701 0.404 0.243 $\eta $ 1 0.379 0.076 0.02 0.006 $\Delta \nu /{10^3}$ 2.88 3.19 4.64 112 281
Table 2. Relationship between output linewidth and tilt amount of
Y -axisView tableView in ArticleTable 2. Relationship between output linewidth and tilt amount of
Y -axis0 0.035 0.07 0.105 0.14 ${\eta _x}$ 1 0.998 0.976 0.897 0.754 ${\eta _y}$ 1 0.891 0.446 0.243 0.126 $\eta $ 1 0.889 0.456 0.196 0.095 $\Delta \nu /{10^3}$ 2.88 2.91 3.14 3.37 5.69
Table 3. Relationship between output linewidth and decenter amount of
X and Y- axisView tableView in ArticleTable 3. Relationship between output linewidth and decenter amount of
X and Y- axis0 0.35 0.7 1.05 1.5 $\eta \_x$ 1 0.192 0.051 0.0236 0.014 $\eta \_y$ 1 0.167 0.030 0.009 0.005 $\Delta {\nu _X}/{10^3}$ 2.88 3.58 5.39 7.78 15.9 $\Delta {\nu _Y}/{10^3}$ 2.88 3.68 7.41 521 1031
Table 4. Relationship between output linewidth and LD lens location
View tableView in ArticleTable 4. Relationship between output linewidth and LD lens location
5.5 5.535 5.57 5.605 5.64 ${\eta _x}$ 1 0.122 0.053 0.035 0.026 ${\eta _y}$ 1 0.745 0.435 0.307 0.235 $\eta $ 1 0.091 0.023 0.011 0.007 $\Delta \nu /{10^3}$ 2.88 4.35 9.41 29.2 564
Table 5. Collimating lens installation tolerance of Littman-Metcalf external cavity
View tableView in ArticleTable 5. Collimating lens installation tolerance of Littman-Metcalf external cavity
${T_X}$ ${T_Y}$ ${D_X}$ ${D_Y}$ ${D_Z}$ Assembly tolerance 0.0483 0.0881 0.3487 0.3046 0.0165
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Ping Zhou, Yongqian Wu, Rongzhu Zhang. Influence of the misalignment of the collimating lens on the line-width of Littman-Metcalf grating external cavity laser[J]. Infrared and Laser Engineering, 2022, 51(4): 20210168
Paper Information
Category: Lasers & Laser optics
Received: Dec. 20, 2021
Accepted: --
Published Online: May. 18, 2022
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