RTP Electro-Optic Element —— For Electro-Optic Modulation R-Q-Y-040-10-20-1064
RTP crystals (rubidium titanyl phosphate, RbTiOPO4) are isomorphic with KTP. They offer stable mechanical and chemical properties, high nonlinear optical and electro-optic coefficients, a high laser damage threshold, high dielectric constant and resistivity, a wide transmission band, low piezoelectric ringing, low insertion loss, resistance to deliquescence and suitability for high-frequency operation. Applications are mainly nonlinear and electro-optic systems. Low- and medium-power lasers are an important market, including high-repetition-rate Q-switched lasers, mode-locked pulsed lasers and Er:YAG lasers. Electro-optic modulation enables Q-switches, amplitude and phase modulators, pulse pickers and cavity dumpers. RTP has become a popular electro-optic Q-switch material for industrial laser processing, laser medicine, laser ranging, scientific exploration, defense and military industry. RTP is biaxial. To reduce temperature-induced refractive-index changes, electro-optic devices generally use two matched crystals of equal size and performance with mutually perpendicular optical axes. Such devices operate stably at -50℃-+70℃, provided both crystals have the same temperature field. Connecting the two crystals in series further halves the modulation voltage, suiting military laser rangefinder/designators and medical lasers. RTP electro-optic elements use a thermally compensated dual-crystal assembly: two matched crystals lie on the propagation axis (X or Y), with one rotated by 90 degrees. Applications include electro-optic Q-switches, pulse pickers, phase modulators, amplitude modulators, cavity dumpers, electro-optic shutters, attenuators & filters. Our RTP crystal series uses distinctive molten-salt pulling growth and coating technologies for electro-optic applications over 500nm~3000nm. Compatible high-voltage drivers support high-frequency operation, making these reliable components in military, medical and industrial laser systems. We offer single RTP elements for phase modulators, thermally compensated matched pairs and plug-and-play electro-optic assemblies with or without housings. Stocks of high-quality raw crystals support custom RTP electro-optic modulation devices. Temperature-compensated RTP electro-optic switches each contain two crystals. Their high resistivity (approximately 1012Ω·cm), high resistance to light-induced damage and other distinctive properties give the switches excellent performance. The figure compares RTP and BBO electro-optic Q-switch behavior at high repetition rate (30kHz). The BBO switch uses one 2.5x2.5x25mm³ crystal, while the RTP switch uses two 6x6x7mm³ crystals. At 30 kHz, the figure shows pronounced piezoelectric oscillation in BBO and none in RTP.
Overview
Specifications
| Parameter | Value |
|---|---|
| Transmission Range | 500-3000nm |
| Transmittance [Wavelength :1064 nm] | >99% |
| Half-Wave Voltage [9x9x10mm Q Switch] | 3.6kV(9x9x10mm Q Switch ) |
| Extinction Ratio | up to 30dB |
| Effective Aperture | 1.5mm x 1.5mm~15mm x 15mm |
| Crystal Length | up to 50mm |
| Acceptance Angle | <4° |
| Standard Antireflection Coating | R<0.2% |
| Damage Threshold | Up to 1GW/cm²@1064 nm, 10 ns pulses or 10J/cm² |
Applications
Key Features
Datasheet
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