Acousto-Optic Devices Acousto-Optic Light Modulators Type: EFLM This acousto-optic light modulator, using an acoustooptic effect, can modulate various lasers ranging from visible light to infrared light. Features ● Low driving power (0.5 to 2.5 W) modulation bandwidth (DC to 40 MHz) ● Superior temperature characteristics (2q: 200 ppm/°C) ● RoHS compliant ● Wide Recommended Applications ● Laser printer Doppler measuring ● Various light recording ● Various light measuring ● Laser processing ● Q-switch for Fiber Laser ● Laser Principle Light Modulators Incident laser Medium beam Absorber 1st diffracted light q 2q 0st diffracted light Acoustic wave Transducer Oscillator Explanation of Part Numbers 1 2 3 4 E F L M Product Code 5 6 7 Center Frequency 8 9 10 Design No. Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use. Should a safety concern arise regarding this product, please be sure to contact us immediately. 00 Dec. 2014 Acousto-Optic Devices Ratings and Characteristics ● Type EFLM Part No. Item EFLM200AL2G EFLM135Y01A AO Medium TeO2 Acoustic Velocity: u (m/s) 4260 EFLM120Y05B Optical Wavelength: l (nm) 440 to 770 1064 1550 Center Frequency: f (MHz) 200 135 120 Modulation Bandwidth: Δ f (MHz) (Beam Diameter (mm)) DC–28 min. (00.075) DC–4 min. (00.5) DC–4 min. (00.5) Maximum Diffraction Effciency (%) (Beam Diameter (mm)) 75 min. (00.075) 75 min. (00.5) 50 min. (00.5) Pulse Response (ns) (Beam Diameter (mm)) 12 max. (00.075) 80 min. (00.5) 80 min. (00.5) Maximum Beam Diameter (mm) 0.4 0.6 0.8 Maximum Driving Power (W) 1.0 1.2 2.0 90 min. ( l=400 to 500 nm) 85 min. ( l=551 to 700 nm) 92 min. 90 min. Optical Transmittance (%) Extinction Ratio 1000 : 1 min. Input Impedance (Ω) 50 (VSWR 1.5 max.) Linear (Vertical to the base: E Vector) Laser Polarization Dimensions in mm (not to scale) EFLM200AL2G Aperture f3 Connector(SMA) 30.4 8.1 21 15 9.0±0.1 Hight of aperture center 24.8 2.5 41.5 30 45 (53) f3 Depth4 2-f4 4 14.5 1 20.4 9.5 14 f3 Depth4 Connector(SMA) 32 14.0±0.1 13 9.5 28 7 10 30 18.5 10 2-M3(ISO) Depth4 23 15.5 Aperture f3 Connector(SMA) EFLM120Y05B 9.3 23.5 Aperture f3 EFLM135Y01A 25.0±0.1 10 4-M2.6(ISO) Depth4 unit : (mm) ■ Please contact the factory for packaging methods. Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use. Should a safety concern arise regarding this product, please be sure to contact us immediately. 00 Dec. 2014 Acousto-Optic Devices Typical Characteristics (AO Modulators) Beam Diameter vs. Pulse Response Optical Transmittance l=488 nm 30 20 l=1064 nm 10 l=1550 nm 0 400 800 1200 1600 Optical Wavelength (nm) 2000 Pulse Response (ns) Static Optical Loss (%) 30 20 Beam Diameter vs. Diffraction Efficiency 200 MHz 10 90 Diffraction Efficiency (%) 0 100 200 Beam Diameter (µm) 80 70 Beam Diameter vs. Eccentricity of Diffracted Beam 1.0 0 50 100 Beam Diameter (µm) 150 200 0.5 0 100 200 300 400 500 600 Beam Diameter (µm) 1 M200 0.5 Pulse Response EFLM200 0 1 Angle of Incident Light q (deg) 2 q 2q Driving Power vs. Diffraction Efficiency Diffraction Efficiency(%) M200 Light Intensity(%) Effective Ratio of Incident Light(%) Angle of Incident Light vs. Effective Ratio of Incident Light Eccentricity 60 100 l=633nm 80 60 l=488 nm 10 40 0 20 0 100 90 Time(10ns/div.) 0 0.5 1.0 Driving Power (W) 1.5 Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use. Should a safety concern arise regarding this product, please be sure to contact us immediately. 00 Dec. 2014