{"id":9407,"date":"2022-08-10T06:12:48","date_gmt":"2022-08-10T06:12:48","guid":{"rendered":"https:\/\/www.szlaser.com\/?page_id=9407"},"modified":"2022-08-16T03:23:40","modified_gmt":"2022-08-16T03:23:40","slug":"ndyvo4","status":"publish","type":"page","link":"https:\/\/www.szlaser.com\/index.php\/wiki\/ndyvo4\/","title":{"rendered":"Comparison of Nd Doped Crystals"},"content":{"rendered":"

Comparison of Nd Doped Crystals<\/h1><\/h1><\/div>

We will compare the difference of multiple Nd Doped crystal in this article<\/p>\n<\/div>

# Nd:YVO4<\/a><\/span> and Nd:Yag<\/a><\/span><\/h2><\/h1><\/div>

Neodymium-doped yttrium vanadate (Nd:YVO4<\/a><\/span>) crystal is a kind of laser crystal with excellent performance, which is suitable for the manufacture of laser diode-pumped, especially medium and low power lasers.<\/p>\n

Nd:YVO4<\/a> <\/span>Lasers have been widely used in machinery, material processing, spectroscopy, wafer inspection, displays, medical testing, laser printing, data storage and other fields. And Nd:YVO4<\/a><\/span> Diode-pumped solid-state lasers are rapidly replacing the market for conventional water-cooled ion and lamp-pumped lasers, especially in terms of miniaturization and single longitudinal mode output.<\/p>\n

Nd:YVO4<\/a><\/span> compared to Nd:YAG<\/a><\/span>
\n**Higher absorption coefficient and larger stimulated emission cross section for pump light. Laser diode-pumped Nd:YVO4<\/a><\/span> crystals are used in conjunction with crystals with high nonlinear coefficients such as LBO, BBO<\/a><\/span>, KTP<\/span>,<\/a> etc., to achieve better frequency doubling conversion efficiency, and can be made to output near-infrared, green, blue to ultraviolet and other types all-solid-state lasers. **<\/p>\n

Advantages of Nd:YVO4<\/a><\/span> vs.\u00a0Nd:YAG<\/a><\/span>:<\/p>\n

\u2022 The pump bandwidth around 808nm is about 5 times that of Nd:YAG<\/span><\/a>;
\n\u2022 The stimulated emission cross section at 1064nm is 3 times that of Nd:YAG<\/span><\/a>;
\n\u2022 Low laser threshold, high slope efficiency;
\n\u2022 Uniaxial crystal, the output is linearly polarized.<\/p>\n<\/div>

# Yb:Yag<\/a><\/span> and Nd:Yag<\/a><\/span><\/h1><\/div>

Compared with the commonly used Nd:YAG<\/a><\/span> crystal, Yb:YAG<\/a><\/span> crystal has a wider absorption bandwidth, which can reduce the temperature management requirements in the use of diode lasers, longer laser upper energy level life, and heat load per unit of pump power. Also 3-4 times lower. Yb:YAG<\/a> crystal at 1030nm can well replace the use of Nd:YAG<\/a><\/span> crystal at 1064nm, and its second harmonic at 515nm can replace Ar ion laser emitting 514nm wavelength.<\/p>\n

Advantages of Yb:YAG<\/a><\/span> crystals:<\/p>\n

\u2022 Very low local superheat, less than 11%
\n\u2022 High slope performance
\n\u2022 Broad absorption band, about 8nm@940nm
\n\u2022 No excited state absorption or upconversion
\n\u2022 Conveniently pumped with reliable InGaAs diodes at 940nm (or 970nm)
\n\u2022 High thermal conductivity and high mechanical strength
\n\u2022 High optical quality<\/p>\n<\/div>

# Nd:GdVO4<\/a><\/span><\/h1><\/div>

\u2022Large absorption coefficient and wide absorption bandwidth, less dependence on pump wavelength;
\n\u2022Good thermal conductivity
\n\u2022Low laser threshold and high laser output slope efficiency
\n\u2022High laser damage threshold
\n\u2022Good laser output polarization
\n\u2022Large stimulated emission cross section<\/p>\n<\/div>

# Nd:Ce:YAG<\/a><\/span><\/h1><\/div>

\u2022high efficiency
\n\u2022low threshold
\n\u2022Good anti-ultraviolet radiation properties
\n\u2022good thermal stability
\n\u2022High optical performance<\/p>\n<\/div>

# Nd:KGW<\/h1><\/div>

Due to the W-O covalent bond, the cold shock effect of the fluorescence concentration of Nd3+ ions in KGW crystals is weakened, so this crystal has activated ions with higher doping concentration; in addition, Nd3+ ions in KGW crystals have a half-bandwidth of about 12nm at 808nm The absorption bandwidth is well matched to the emission wavelength of commercial laser diodes.<\/p>\n<\/div>

Brief Introduction to Nd:YVO4 ><\/span><\/a><\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":8230,"menu_order":5,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-9407","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"\nComparison of Nd Doped Crystals - SZLASER<\/title>\n<meta name=\"description\" content=\"Nd:YVO4 crystal is suitable for the manufacture of laser diode-pumped, especially medium and low power lasers.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.szlaser.com\/index.php\/wiki\/ndyvo4\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Comparison of Nd Doped Crystals\" \/>\n<meta property=\"og:description\" content=\"Nd:YVO4 crystal is suitable for the manufacture of laser diode-pumped, especially medium and low power lasers.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.szlaser.com\/index.php\/wiki\/ndyvo4\/\" \/>\n<meta property=\"og:site_name\" content=\"SZLASER\" \/>\n<meta property=\"article:modified_time\" content=\"2022-08-16T03:23:40+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.szlaser.com\/index.php\/wiki\/ndyvo4\/\",\"url\":\"https:\/\/www.szlaser.com\/index.php\/wiki\/ndyvo4\/\",\"name\":\"Comparison of Nd Doped Crystals - 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