Reactive Processing of CVD Diamond Substrates in Liquid Ambient by Second Harmonic of Nd:YAG Laser

Abstract The objective of this investigation is to study the effects of laser radiation at 532 nm, the second harmonic of Q-switched Nd:YAG laser on polycrystalline diamond in air and liquid (water and H2O2) ambient. Phase changes and laser-induced stress due to structural deformations are analyzed using Raman spectroscopy. Surface morphology of the processed region of diamond and formation of microcracks is studied by scanning electron microscopy. Drilling of diamond substrates, in water ambient, is observed to be faster, 1.364 times, than that in the air. Enhancement in the drilling speed and uniformity of the drilled hole are discussed from the view of presence of reactive hydrogen and / or oxygen radicals liberated during the interaction of laser radiation with the diamond surface in water ambient.

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Effect of laser radiation parameters on the conductivity of structures produced on the polycrystalline diamond surface

Bulletin of the Lebedev Physics Institute ◽

10.3103/s1068335617080073 ◽

2017 ◽

Vol 44 (8) ◽

pp. 246-248 ◽

Cited By ~ 2

Author(s):

M. S. Komlenok ◽

M. A. Dezhkina ◽

V. V. Kononenko ◽

A. A. Khomich ◽

A. F. Popovich ◽

...

Keyword(s):

Laser Radiation ◽

Polycrystalline Diamond ◽

Diamond Surface

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Investigation of the Characteristic of the Nd:YAG Laser for Standard Wavelength in Metrology

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.770.398 ◽

2013 ◽

Vol 770 ◽

pp. 398-401

Author(s):

Prayut Potirak ◽

Monludee Ranusawud ◽

Pichet Limsuwan ◽

Prathan Buranasiri

Keyword(s):

Second Harmonic Generation ◽

Diode Laser ◽

Harmonic Generation ◽

Nd:Yag Laser ◽

Laser Power ◽

Second Harmonic ◽

Harmonic Generator ◽

Second Harmonic Generator ◽

532 Nm ◽

Nd:Yag Crystal

This research studied characteristics of the Nd:YAG laser with second harmonic generation (SHG) at 532 nm. It can be develop as a standard wavelength according to the recommendation made by the Comite International des Poids et Measures (CIPM). This study investigates various parameters that effect wavelength and laser power of the Nd:YAG laser such as injection current of diode laser, temperature of Nd:YAG crystal and second harmonic generator crystal. Its wavelength can be tuned in the range of standard wavelength at 532.24503 nm with 10-7 of stability.

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Mid-Infrared Sources Using Dye Lasers in KTiOAsO4 and LiIO3

Applied Spectroscopy ◽

10.1366/0003702963905745 ◽

1996 ◽

Vol 50 (6) ◽

pp. 790-794 ◽

Cited By ~ 2

Author(s):

A. H. Kung ◽

Suli Fei ◽

H. L. Strauss

Keyword(s):

Nd:Yag Laser ◽

Second Harmonic ◽

Damage Threshold ◽

Calibration Method ◽

Laser Damage Threshold ◽

Infrared Source ◽

Yag Lasers ◽

Frequency Calibration ◽

Infrared Sources ◽

532 Nm

A coherent infrared source tunable from 3.4 to 5.3 μm has been constructed by difference-frequency mixing of the second harmonic of a Q-switched Nd:YAG laser and a pulsed dye laser using the new crystal KTiOAsO4 (KTA). A peak power of >50 kW and pulse energy of >250 μJ are measured at 4.4 μm. The results are compared with mixing in LiIO3. For a low-power Nd:YAG laser that produces 200 mJ of 532-nm radiation, the infrared power is similar for the two crystals. For high-power YAG lasers, calculation shows that commercial KTA crystals can produce over 10 mJ of IR power in the absence of absorption loss. The laser damage threshold of KTA at 532 nm is determined to be 300 ± 30 MW/cm2. Both the maximum IR power and the damage threshold are several times higher for KTA than for LiIO3. A simple frequency calibration method is described.

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Second harmonic generation from noncollinear orthogonally polarised Nd:YAG laser radiation in β-BaB2O4

Journal of Physics D Applied Physics ◽

10.1088/0022-3727/22/4/017 ◽

1989 ◽

Vol 22 (4) ◽

pp. 562-563 ◽

Cited By ~ 4

Author(s):

G C Bhar ◽

S Das ◽

U Chatterjee

Keyword(s):

Laser Radiation ◽

Second Harmonic Generation ◽

Harmonic Generation ◽

Nd:Yag Laser ◽

Second Harmonic

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A non-linear optical crystal, Cd3Zn3(BO3)4

Acta Crystallographica Section C Crystal Structure Communications ◽

10.1107/s0108270103020390 ◽

2003 ◽

Vol 59 (11) ◽

pp. i107-i108 ◽

Cited By ~ 12

Author(s):

Tongqing Sun ◽

Feng Pan ◽

Ruji Wang ◽

Guangqiu Shen ◽

Xiaoqing Wang ◽

...

Keyword(s):

Laser Radiation ◽

Harmonic Generation ◽

Nd:Yag Laser ◽

Title Compound ◽

Second Harmonic ◽

X Ray Diffraction ◽

X Ray ◽

Non Linear ◽

Optical Crystal ◽

Linear Optical

The title compound, tricadmium trizinc tetraborate, Cd3Zn3(BO3)4, is a new non-linear optical (NLO) crystal and its structure has been determined by single-crystal X-ray diffraction. This compound is composed of planar [BO3]3− groups sharing O atoms with CdO4 or ZnO4 tetrahedra. The BO3 triangles are located on threefold axes and are arranged with nearly the same orientation. The Cd and Zn atoms are disordered on the same site in the proportion 1:1. A strong second harmonic generation of Nd:YAG laser radiation (λ = 1064 nm) has been observed for a crystal of the title compound.

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