3 minitra hahatakarana ny kristaly lithium niobate (1)
With the introduction of “fotodrafitrasa vaovao”, 5Niditra tsikelikely ny fiainantsika i G, ary serivisy toy ny informatika rahona, zava-misy virtoaly, fifandraisana angona, ary ny horonan-tsary avo lenta dia mbola nivoatra ihany koa, mitondra ny fanavaozana ny tambajotra optika fototra ho amin'ny fifindran'ny hafainganam-pandeha faran'izay haingana sy lavitra lavitra. Amin'ity dingana ity, misy fitaovana fototra tena ilaina – Izany no lithium niobate modulator (LiNbO3).
Lithium Niobate Modulator
It is reported that the lithium niobate modulator is made by using the electro-optic effect of lithium niobate crystal combined with the optoelectronic integration process. It can convert electronic data into photonic information and is the core component for realizing electro-optical conversion. manokana, what is outstanding about it, we must first understand the electro-optical effect and application of its raw material lithium niobate crystal.
About lithium niobate crystals
Lithium niobate is a compound of niobium, lithium and oxygen. It is a negative crystal with a large spontaneous polarization (0.70 C/m2 at room temperature), and is a ferroelectric with the highest Curie temperature (1210 °C) found so far.
Ny sary eo amin'ny ankavia dia kristaly niobate lithium niobate mirefy 3 santimetatra miaraka amin'ny singa mitovy; ny sary eo ankavanana dia kristaly lithium niobate vita amin'ny vy
Ny kristaly Lithium niobate dia manana toetra roa izay manintona indrindra. VOALOHANY, Ny kristaly lithium niobate dia manana fiantraikany photoelectric maro, anisan'izany ny piezoelectric vokany, electro-optic vokany, nonlinear optique vokany, vokatry ny photorefractive, vokatry ny photovoltaic, ary ny vokatry ny photoelastic, vokatry ny acousto-optic sy ny fananana photoelectric hafa;
FAHAROA, Ny fahombiazan'ny kristaly lithium niobate dia tena azo fehezina, izay vokatry ny firafitry ny lattice sy ny firafitry ny kilema be dia be amin'ny kristaly lithium niobate. Ny fananana maro amin'ny kristaly lithium niobate dia azo fehezina amin'ny alàlan'ny fananganana kristaly, singa doping, ary fanaraha-maso valence.
Ankoatry ny, the physical and chemical properties of lithium niobate crystals are quite stable, easy to process, wide light transmission range, large birefringence, and easy to prepare high-quality optical waveguides.
Ary noho izany, the optical modulator based on lithium niobate crystal has unparalleled advantages in long-distance communication: it not only has a small chirp effect, high modulation bandwidth, good extinction ratio, but also has excellent stability and high speed. It is widely used in high-speed and high-bandwidth long-distance communication.
Harvard University once commented on lithium niobate: if the center of the electronic revolution is named after silicon material, then the birthplace of the photonics revolution is likely to be named after lithium niobate.
Preparation of Lithium Niobate Crystals
(1) Lithium niobate kristaly miaraka amin'ny composition
Ho an'ny firafitry ny kristaly lithium niobate mitovy, Ny fomba fisintonana no tena manomana azy. Na dia ny fomba bubble, ny fomba fitarihana fomba, ary ny fomba gradient mari-pana dia nampiasaina koa mba hanomanana kristaly lithium niobate, tsy manana tombony mazava na fepetra fampiharana mazava izy ireo raha oharina amin'ny fomba fisarihana, ka tsy nojerena betsaka izy ireo.
(2) Manakaiky ny tahan'ny stoichiometric amin'ny kristaly lithium niobate
Na dia eo akaikin'ny stoichiometric ratio lithium niobate kristaly dia manana fananana photoelectric tena tsara, ny tahan'ny dia miala amin'ny teboka eutektika amin'ny solid-liquid sy ny singa mitovy, noho izany dia tsy azo atao ny mampiasa ny fomba fisintonana mahazatra mba hampitomboana kristaly avo lenta. Amin'izao, the main preparation methods are lithium-rich melt method, flux method and diffusion method.
(3) Lithium niobate single crystal thin film
Lithium niobate single crystal thin films can be used in micro-nano structures such as optical waveguides and acoustic devices, as well as in the preparation of hybrid integrated devices such as silicon-based devices. People have been exploring the preparation of lithium niobate single crystal thin films for a long time, but the only method that has really been applied is the “Ion Slicing” technology. Amin'izao, it has been commercialized and can provide single crystal thin film products with a thickness of 300~900 nm.
Lithium niobate single crystal thin film
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