Excellent price at high quality. The budget saver in your laser design. Water-Cooled AO-FS Q-Switch | The AO Q-FS-27-3 and the AOQ-FS-40-4 are water-cooled acousto-optic Q-switches mainly used in Nd:YAG laser system. An RF input at the working frequency of the unit sets up an acoustic wave phase grating in the optical medium. This phase grating deflects the beam at a sufficiently high angle to prevent lasing when the modulator is placed within the resonant cavity of a laser. |  |
Application:Fused quartz of very high quality and low reflection coatings are used for high transmission. This allows for a very low cavity insertion loss in th off state as well as ensuring a high damage threshold. Absolute Maximum Ratings:| Electrical Power Input: | 50 W | | Damage Threshold: | > 500 MW/cm² @ 1064 nm, 10 ns | | Highest Water Temperature: | 40°C |
| | AOQ-FS-27-3 | AOQ-FS-40-4 | | Cooling: | water-cooled | water-cooled | | Working Frequency: | 27 MHz | 40 MHz | | Working Wavelength: | 1047-1064 nm | 1047-1064 nm | | Interactive Material: | Fused silica | Fused silica | | Anti-Reflection Coating: | 0.2% all surfaces | 0.2% all surfaces | | Standing Wave Ratio: | <1.2:1 | <1.2:1 | | Protection Temperature: | +55°C ± 5°C (automatic shutdown) | +55°C ± 5°C (automatic shutdown) | | Input: | BNC | BNC | | Insertion Loss: | <2% open state >40% blocking state | <2% open state >40% blocking state | | Clear Aperture: | Φ3 mm | Φ4 mm | | Deflection: | 0.14° = 2.4 mrad | 0.14° = 2.4 mrad |
Case Styles: 
Air-Cooled AO-FS Q-Switch The AOQ-FS-40-1 and the AOQ-FS-70-1 are convection-cooled acousto-optic Q switches mainly used in Nd:YAG laser system. An RF input at the working frequency of the unit sets up an acoustic wave phase grating in the optical medium. This phase grating deflects the beam at a sufficiently high angle to prevent lasing when the modulator is placed within the resonant cavity of a laser. |  |
Application: The small size and good stability make this unit suitable for use in diode pumped solid-state lasers. Absolute Maximum Ratings: | Damage Threshold: | > 500 MW/cm² @ 1064 nm, 10 ns |
| | AOQ-FS-40-1 | AOQ-FS-70-1 | | Cooling: | air-cooled | air-cooled | | Working Frequency: | 40 MHz | 70 MHz | | Working Wavelength: | 1.06 μm | 1.06 μm | | Interactive Material: | Fused Silica | Fused Silica | | Anti-Reflection Coating: | 0.2% all surfaces | 0.2 % all surfaces | | Diffraction Ratio: | 40% - 70% | 40% - 70% | | Electrical Power: | 2.5 W - 5 W | 2.5 W - 5 W | | Pulse Rise Time: | ≤ 10 ns @ 40 MHz | ≤ 25 ns @ 70 MHz | | Modulation Frequency: | 1 KHz - 50 KHz | 1 KHz - 50 KHz | | VSWR: | < 1.2:1 | <1.2:1 | | Input: | BNC or SMA | BNC or SMA | | Insertion Loss: | <2% open state >40% blocking state | <2% open state >40% blocking state | | Clear Aperture: | Φ1 mm | Φ1 mm | | Deflection: | 0.33° = 5.8 mrad | 0.33° = 5.8 mrad |
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Optics 
