A complete family of E-O modulators, used for modulating laser beams, for intensity or frequency or phase modulation, consists of non-linear optics (crystals) utilizing the transverse Pockels effect (low voltage). The crystals span the entire laser spectrum using ADP, AD*P, KDP, KD*P, ADA, AD*A, RDA, CD*A, BBO, LBO, KTP, KnbO 3, LiTaO3. Special AR coating in UV, visible or IR region are available upon request.
Precisely oriented, the crystals are mounted in thick-walled aluminum cylinders to minimize thermal gradients. Low absorption index matching fluid, combined with a fluid path length of less than 2mm, ensures high optical power transmission capability with no mode distortion or blooming
EO-10 SERIES
mid IR (600-4500nm) LiTaO3
SPECIFICATIONS:
| EO-10 | EO-11 | EO-12 | EO-13 | EO-14 | EO-15 | |
| Half wave voltage @ 488 nm | 54V | 82V | 36V | 72V | 72V | 144V |
| Half wave voltage @ 514 nm | 57V | 87V | 38V | 76V | 76V | 152V |
| Half wave voltage @ 633 nm | 70V | 107V | 47V | 94V | 94V | 188V |
| Half wave voltage @ 1064 nm | 117V | 180V | 79V | 158V | 158V | 316V |
| Half wave voltage @ 2000 nm | 220V | 330V | 148V | 296V | 296V | 592V |
| Aperture | 1mm | 1mm | 2.2mm | 4.5mm | 2.2mm | 4.5mm |
| Capacitance pF | n/a | n/a | 57pF | 29pF | 29pF | 114pF |
| Transmission | 85% | 85% | 85% | 85% | 85% | 85% |
| Differential Propoation Delay | 0.4 ns | 1.2 ns | 2.7 ns | 1.4 ns | 1.4 ns | 1.4 ns |
| Contrast Ratio @ 633 nm | 100:1 | 100:1 | 100:1 | 50:1 | 100:1 | 100:1 |
| Contrast Ratio @ 1064 nm | 150:1 | 150:1 | 150:1 | 100:1 | 150:1 | 150:1 |
Models EO-10 & EO-11 are HIGH SPEED modulators of traveling wave type which are used for wide bandwidth (DC to 1000 MHz) high frequency modulation, for AMPLITUDE modulating and PHASE modulating (high 48 mrad/V phase sensitivity). The modulators can handle RF power up to 10 watts and CW optical power up to 1 watt @ 1064nm.
Models EO-10-BR is a Brewster E-O PHASE modulator, which assures the lowest possible loss over the widest optical spectrum (600-3500nm). Aperture is 2mm. The configuration of the modulator can be like a resonant electro-optic modulator type or like a traveling wave type phase modulator with a bandwidth exceeding 1000 MHz.
Material: Lithium Tantalate crystal (LiTaO 3)
EO-20 SERIES
ADP & D-ADP
(45° X cut)1
(400- 1100 nm ADP & KDP)
SPECIFICATIONS:
| EO-20 | EO-21 | EO-22 | EO-23 | EO-26 | EO-28 | EO-29 | |
| Spectral range nm | 400-800 | 400-1100 | 400-800 | 400-1100 | 400-800 | 400-800 | 400-1100 |
| Half wave voltage @ 488 nm | 90V | 65V | 90V | 65V | 90V | 180V | 130V |
| Half wave voltage @ 633 nm | 115V | 85V | 115V | 85V | 115V | 230V | 170V |
| Phase sensitivity @ 633 nm | 27 | 36 | 27 | 36 | 27 | 13 | 18 |
| Capacitance pF | 180 | 250 | a b | a b | a | 80 | 120 |
| Transmission @ 633nm | >90% | >90% | >90% | >90% | >90% | >90% | >90% |
| Frequency Response (-3 dB) | A | A | B C D | B C D | E | C | C |
| Aperture 2.5mm (3.5mm available) | |||||||
| Dimensions: 1.97" Dia × 8.90" L (EO-28 & EO-29: 1.97" Dia × 4.98" L) |
1The transverse mode: The electric field is applied normal to the direction of propagation of the light beam. The optical propagation direction for amplitude modulation is at an angle 450 to the Y or Z axis while the electric field is applied along the X axis.
a) Transmission line 50 ohm
b) Transmission line 100 ohm
A) DC-10 MHz
B) DC-25 MHz
C) DC-50 MHz
D) DC-100 MHz
E) Risetime 2 ns or less
EO-300 SERIES
Visible region (360-1100nm) KD*P
SPECIFICATIONS:
| EO-320 | EO-327 | EO-331 | EO-332 | EO-333 | EO-334 | EO-361 | EO-362 | |
| Half wave voltage @ 633 nm | 750V | 120V | 750V | 562V | 450V | 225V | 900V | 450V |
| Half wave voltage @ 1064 nm | 1255V | 188V | 1255V | 941V | 750V | 376V | 1507V | 750V |
| Aperture | 2.5mm | 2.5mm | 3mm | 3mm | 3mm | 3mm | 6mm | 6mm |
| Capacitance pF | 11pF | 90pF | 14pF | 18pF | 23pF | 45pF | 23pF | 45pF |
| 50 ohm | n/a | yes | n/a | n/a | n/a | yes | n/a | n/a |
| 100 ohm | n/a | yes | n/a | n/a | n/a | yes | n/a | n/a |
| Transmission | 85% | 85% | 85% | 85% | 85% | 85% | 85% | 85% |
| Connectors | pins | 2 BNC | MHV | MHV | MHV | 2 BNC | MHV | MHV |
| Diameter | 25mm | 50mm | 50mm | 50mm | 50mm | 50mm | 50mm | 50mm |
| Length | 38mm | 225mm | 55mm | 65mm | 75mm | 125mm | 75mm | 125mm |
AMPLITUDE modulator, optimized for intensity modulation. PHASE modulator option available
Impedances available:
a) lumped capacitive, comes with two BNC connectors
b) transmission line version (50 ohm & 100 ohm), come with two triax and one bias connector
The modulator has some piezo-electric resonances in the 100-800 KHz fundamental frequencies (20% more than devices made from LiTaO 3)
The modulator can be converted into a POLARIZATION ROTATOR by adding an internal waveplate.
RESONANT ELECTRO-OPTIC MODULATORS
Lithium Tantalate (LiTaO3)
UV (200-360nm) BBO
Visible region (360-760nm) KD*P
SPECIFICATIONS:
| Wavelength | 0.55-3.0 um |
| Aperture | 2mm |
| RF Bandwidth | 1-2% |
| Max RF Power | 2 watt |
| Max Optical Power | 1 watt/mm2 |
| Modulation Depth | >0.1 Rad/Volt |
| Impedance | 50 ohm |
| Half wave voltage | <20v |
| Connectors | SMA |
| Max VSWR | 1.5:1 |
| Efficient power transfer of the electrical energy to the electro-optic crystal. |
Model EO-10-REM-BR is a Brewster resonant E-O PHASE modulator, which assures the lowest possible loss over the widest optical spectrum (500-3500nm). Aperture is 2mm. The configuration of the modulator can be like a resonant electro-optic modulator type or like a traveling wave type phase modulator with a bandwidth exceeding 1000 MHz.
Material: Lithium Tantalate crystal (LiTaO 3)
