I ka makahiki 1976, Zumsteg et al. ua hoʻohana i ke ʻano hydrothermal e ulu ai i ka rubidium titanyl phosphate (RbTiOPO₄, i kapa ʻia ʻo RTP) crystal. ʻO ka kristal RTP he ʻōnaehana orthorhombic, mm2 helu hui, P_na21 hui ākea, loaʻa nā pōmaikaʻi piha o ka nui electro-optical coefficient, kiʻekiʻe o ka pōʻino pōʻino paepae, haʻahaʻa conductivity, ākea ākea ākea, non-deliquescent, haʻahaʻa hoʻokomo poho, a hiki ke hoʻohana ʻia no ka hana pinepine repetition kiʻekiʻe (a hiki i 100 kHz), etc. A ʻaʻohe hōʻailona hina ma lalo o ka irradiation laser ikaika. I nā makahiki i hala iho nei, ua lilo ia i mea kaulana no ka hoʻomākaukau ʻana i nā Q-switch electro-optic, kūpono loa no nā ʻōnaehana laser repetition kiʻekiʻe..

Hoʻoheheʻe ʻia nā mea maka o RTP i ka wā e hoʻoheheʻe ʻia ai, a ʻaʻole hiki ke ulu ʻia e nā ʻano huki hoʻoheheʻe maʻamau. ʻO ka maʻamau, hoʻohana ʻia nā fluxes e hōʻemi i ka helu heheʻe. Ma muli o ka hoʻohui ʻana o ka nui o ka flux i nā mea maka, ʻo ia’paʻakikī loa e ulu i ka RTP me ka nui-nui a me ke kūlana kiʻekiʻe. I ka makahiki 1990, ua hoʻohana ʻo Wang Jiyang a me nā mea ʻē aʻe i ke ʻano o ka flux lawelawe ponoʻī e kiʻi i kahi kala ʻole, piha a me ka ʻaʻahu RTP hoʻokahi aniani o 15. mm×44 mm×34 mm, a ua hana i kahi noiʻi ʻōnaehana ma kāna hana. I ka makahiki 1992 ʻo Oseledchiket al. Ua hoʻohana ʻo ia i kahi ʻano hana like ʻole e hoʻoulu i nā kristal RTP me ka nui o 30 mm×40 mm×60 mm a me ka paepae poino laser kiʻekiʻe. I ka makahiki 2002 Kannan et al. ua hoʻohana ʻia he wahi liʻiliʻi o MoO₃ (0.002 mol%) e like me ka flux ma ke ʻano o ka hua kiʻekiʻe e ulu i nā kristal RTP kiʻekiʻe me ka nui o 20. mm. I ka makahiki 2010, ua hoʻohana ʻo Roth lāua ʻo Tseitlin i [100] a me [010] i nā hua kuhikuhi, no ka hoʻoulu ʻana i ka RTP nui me ka hoʻohana ʻana i ke ʻano o ka hua kiʻekiʻe.

Hoʻohālikelike ʻia me nā kristal KTP nona nā ʻano hoʻomākaukau a me nā waiwai electro-optical like, ʻo ka resistivity o nā kristal RTP he 2 a 3 mau kauoha o ka nui (10).⁸ Ω·cm), no laila hiki ke hoʻohana ʻia nā kristal RTP e like me nā noi hoʻololi EO Q me ka ʻole o nā pilikia pōʻino electrolytic. I ka makahiki 2008 ʻo Shaldinet al. Ua hoʻohana ʻo ia i ke ʻano o ka hua kiʻekiʻe e ulu i kahi aniani RTP domain hoʻokahi me ka resistivity ma kahi o 0.5×10¹² Ω·cm, he mea pono loa ia no na EO Q-switch me ka puka akaka nui. Ma 2015 Zhou Haitaoet al. Ua hōʻike ʻia nā kristal RTP me ka lōʻihi o ka axis ma mua o 20 Ua hoʻonui ʻia ka mm e ke ʻano hydrothermal, a ʻo ka resistivity he 10¹¹~10¹² Ω·knm. No ka mea, ʻo ke aniani RTP he aniani biaxial, ʻokoʻa ia mai ka aniani LN a me ka aniani DKDP ke hoʻohana ʻia ma ke ʻano he hoʻololi EO Q-. Pono e hoʻololi ʻia i hoʻokahi RTP o ka pālua 90°i ke kuhikuhi o ka malamalama e uku i ka birefringence maoli. ʻAʻole pono kēia hoʻolālā i ka like ʻole o ka optical kiʻekiʻe o ke aniani ponoʻī, akā pono nō hoʻi i ka lōʻihi o nā kristal ʻelua e like me ka hiki, e kiʻi i ka lakio extinction kiʻekiʻe o ka Q-switch.

Ma ke ʻano he maikaʻi loa EO Q-hoololiana mea me kiʻekiʻe-repetition frequency, RTP crystals pili i ka palena o ka nui ka mea hiki ole no ka nui aperture maopopo (ʻO 6 mm wale nō ka puka ākea o nā huahana kalepa). No laila, ʻo ka hoʻomākaukau ʻana i nā kristal RTP me nui nui a me ke kūlana kiʻekiʻe a me ka hoʻolikelike ʻenehana o RTP pai pono mau nui nui o hana noiʻi.