What (who) is yag - definition

SYNTHETIC CRYSTALLINE COMPOUND WITH GARNET STRUCTURE

Yttrium Aluminum Garnet; YAG; YAG:Ce; Ce-YAG; Cr-YAG; Yb:YAG; Nd:Ce:YAG; Chromium-doped yttrium aluminum garnet; Yttrium aluminum garnet; Diamonair; Nd:Cr:YAG; Nd/Cr:YAG; Yag; Y3Al5O12; Al5O12Y3; Yttrium-aluminium-garnet; Cerium-doped Yttrium aluminium garnet

yag

Simply means, yes. Use it to freak your friends out.
Do you wanna go for dinner? Yag. WHAT?!? Yag! and so on and so forth.

YAG training vessel

YAG training tenders; YAG training vessels

YAG 300 (Yard Auxiliary, General) vessels were a series of ten wooden boats built between 1954 and 1955 that throughout their service acted as yard ferries (Blue Boats), training platforms and test beds for route survey equipment with the Royal Canadian Navy (RCN).

https://en.wikipedia.org/wiki/YAG_training_vessel

USS YAG-3

The USS YAG-3 was a miscellaneous auxiliary service craft of the United States Navy that served during World War II.

https://en.wikipedia.org/wiki/USS_YAG-3

Wikipedia

Yttrium aluminium garnet

Yttrium aluminium garnet (YAG, Y₃Al₅O₁₂) is a synthetic crystalline material of the garnet group. It is a cubic yttrium aluminium oxide phase, with other examples being YAlO₃ (YAP) in a hexagonal or an orthorhombic, perovskite-like form, and the monoclinic Y₄Al₂O₉ (YAM).

Due to its broad optical transparency, low internal stress, high hardness, chemical and heat resistance, YAG is used for a variety of optics. Its lack of birefringence (unlike sapphire) makes it an interesting material for high-energy/high-power laser systems. Laser damage levels of YAG ranged from 1.1 to 2.2 kJ/cm² (1064 nm, 10 ns).

YAG, like garnet and sapphire, has no uses as a laser medium when pure. However, after being doped with an appropriate ion, YAG is commonly used as a host material in various solid-state lasers. Rare earth elements such as neodymium and erbium can be doped into YAG as active laser ions, yielding Nd:YAG and Er:YAG lasers, respectively. Cerium-doped YAG (Ce:YAG) is used as a phosphor in cathode ray tubes and white light-emitting diodes, and as a scintillator.

https://en.wikipedia.org/wiki/Yttrium aluminium garnet

Examples of use of yag

1. We passed up on the hallucinogens: ours was yag–lite.

2. After several days in quarantine, Khodorkovsky on Monday was to join the '60 other inmates of the YaG 14/10 camp in the Far East region of Chita.

3. By Nabi Abdullaev Staff Writer Itar–Tass A view of the isolated YaG 14/10 prison, where Mikhail Khodorkovsky is to sleep in a 160–inmate dormitory and, at his request, visit with a priest on Friday.

4. The Arrest That Proved a Turning Point By Catherine Belton Staff Writer Yevgeny Yepanchintsev / Itar–Tass The former Yukos chief is now sitting behind bars at the Yag 14/10 prison camp in the Chita region, near China.

5. Marisol Yag e, the mayor, yesterday convened an extraordinary meeting of councillors to pay homage to Fahd, and opened proceedings to have him declared an adopted son of the city.