AKA0000CE1

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
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