Qaab dhismeedka crystal ee lithium tantalate (LiTaO₃, LT gaaban) waxay la mid tahay crystal LN, oo ka tirsan nidaamka crystal cubic, 3m kooxda dhibic, R3c kooxda meel bannaan. LT crystal waxay leedahay piezoelectric aad u fiican, ferroelectric, pyroelectric, acousto-optic, electro-optic iyo sifooyinka indhaha ee aan tooska ahayn. LT crystal waxa kale oo uu leeyahay sifooyin jidheed iyo kiimiko oo deggan, si fudud loo heli karo cabbir weyn iyo hal crystal tayo sare leh. Meesha waxyeelada laysarka ayaa ka sarraysa crystal LN. Markaa LT crystal ayaa si weyn loogu isticmaalay aaladaha hirarka dhawaaqa sare.

 Kiristaalo LT sida caadiga ah loo isticmaalo, sida kiristaalo LN, waxaa si fudud u koray habka Czochralski ee platinum ama iridium crucible iyadoo la isticmaalayo saamiga lithium-yarida ee isku-dhafka dareeraha adag. Sannadkii 1964-kii, hal kristal ah oo LT ah ayaa waxaa helay Bell Laboratories, iyo 2006, dhexroor 5-inji ah LT crystal waxaa koray Ping Kangiyo al.

 Codsiga korantada-optic Q-modulation, LT crystal way ka duwan tahay crystal LN taas oo ah γ₂₂ waa mid aad u yar. Haddii ay qaadato habka iftiinka iftiinka ee dhinaca dhidibka indhaha iyo qaabeynta transverse kaas oo la mid ah LN crystal, korantada shaqadeeda waxay ka badan tahay 60 jeer ka LN crystal isla xaalad la mid ah. Sidaa darteed, marka LT crystal loo isticmaalo sida electro-optic Q-modulation, waxay qaadan kartaa qaab-dhismeedka labajibbaaran crystal la mid ah RTP crystal leh x-dhidibka sida jihada iftiinka iyo y-dhidibka sida jihada korantada, iyo iyadoo la isticmaalayo ay electro-optic weyn. wada shaqayn γ₃₃ iyo γ₁₃. Shuruudaha sare ee tayada indhaha iyo mashiinnada kiristaalo LT waxay xaddidaan codsigooda Q-modulation-ka elektiroonigga ah.

LT (LiTaO3) crystal- WISOPTIC