Comparative Analysis of Laser Focusing Modes Applicable to Water Jet Guided Laser

En Liang; Yuxing Huang; Hui Jiao; Guanghui Zhang; Liao Zhou; Ping Huang; Chaozheng Chang; Yuhong Long

doi:10.3788/LOP202158.1722002

Laser & Optoelectronics Progress, Volume. 58, Issue 17, 1722002(2021)

Comparative Analysis of Laser Focusing Modes Applicable to Water Jet Guided Laser

En Liang, Yuxing Huang, Hui Jiao, Guanghui Zhang, Liao Zhou, Ping Huang, Chaozheng Chang, and Yuhong Long^*

Sichool of Electrcal and Mechanical Engineering, Guilin University of Electronic Technology, Guilin , Guangxi 541004, China

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Figures & Tables(7)

Fig. 1. Processing principle and characteristic analysis diagram of water-guided laser.（a）Processing principle；（b）beam propagation

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Fig. 2. Paths of parallel beams of light through different focusing lenses.（a）CFM；（b）GBFM；（c）PNAFM

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Fig. 3. Physical optical propagation and spot diagram of X cross section in three modes.（a）CFM；（b）GBFM；（c）PNAFM

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Fig. 4. Optical simulation of two-dimensional diagram in three modes.（a）CFM；（b）GBFM；（c）PNAFM

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$Results of X-section characteristics of non-diffracted beam varying with propagation distance.（a）Light intensity map；（b）spot diagram$

Fig. 5. Results of X-section characteristics of non-diffracted beam varying with propagation distance.（a）Light intensity map；（b）spot diagram

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Table 1. Transmission matrix and focusing ray angle in different focusing modes

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Table 1. Transmission matrix and focusing ray angle in different focusing modes

Focusing model	ABCD transmission matrix	Ray angle
CFM	$M_{1} = [\begin{matrix} A_{1} & B_{1} \\ C_{1} & D_{1} \end{matrix}] = M_{F} M_{E} = [\begin{matrix} A & B \\ - A / f + C & - B / f + D \end{matrix}]$	$θ_{l a s e r} \approx a r c t a n (R / f)$
GBFM	$M_{2} = [\begin{matrix} A_{2} & B_{2} \\ C_{2} & D_{2} \end{matrix}] = M_{G B} M_{E} = [\begin{matrix} A E + C F & B E + D F \\ A G + C H & B G + D H \end{matrix}]$	$θ_{l a s e r} \approx a r c t a n [R / (l + D + t)]$
PNAFM	$M_{3} = [\begin{matrix} A_{3} & B_{3} \\ C_{3} & D_{3} \end{matrix}] = M_{C} M_{E} = [\begin{matrix} A U + C V & B U + D V \\ A X + C Y & B X + D Y \end{matrix}]$	$θ_{l a s e r} \approx (n_{4} - 1) γ$

Table 2. Lens parameters

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Table 2. Lens parameters

Type	PEL	PXL	BXL	GL	BL	PAL	NAL
Semidiameter /mm	12.70	12.70	12.70	12.70	6.35	12.70	12.70
Material	N-BK7	F_SILICA	N-BK7	SLS-1.0	N-BK7	F_SILICA	N-BK7
Focal length /mm	-50	175	100	10
Cone angle /（°）						10	5
Radius /mm	-25.75	80.20	102.40	Infinity	6.35	Infinity	-1×10^-5
Conic	0	0	0	0	0	33.163	-131.646
Center thickness /mm	3.5	4.0	3.6			8.0	3.0
Edge thickness /mm	6.9	3.0	2.0			3.0	6.9

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En Liang, Yuxing Huang, Hui Jiao, Guanghui Zhang, Liao Zhou, Ping Huang, Chaozheng Chang, Yuhong Long. Comparative Analysis of Laser Focusing Modes Applicable to Water Jet Guided Laser[J]. Laser & Optoelectronics Progress, 2021, 58(17): 1722002

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Paper Information

Category: Optical Design and Fabrication

Received: Oct. 21, 2020

Accepted: Nov. 19, 2020

Published Online: Sep. 17, 2021

The Author Email: Long Yuhong (longyuhong@guet.edu.cn)

DOI:10.3788/LOP202158.1722002

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology