Products Catalog (Acousto-Optic Devices)(321KB)

Acousto-Optic Devices
Acousto-Optic Devices
A piezoelectric element is bonded to an acousto-optic medium consisting of single crystal such as tellurium dioxide
(TeO2) and lead molybdate (PbMoO4) or glass, and when an electrical signal is applied to this piezoelectric element
to generate acoustic waves, which are propagated in the medium, a laser beam passing through the medium is
diffracted (Acousto-Optic effect). This diffraction includes Bragg diffraction and anisotropic Bragg diffraction. Using
the former is an acousto-optic light modulator, and using the latter is an acousto-optic light deflector and acoustooptic tunable flter.
The acousto-optic light modulator can modulate laser beam intensity by means of amplitude modulation at a fixed
frequency.
The acousto-optic light deflector is capable of angle modulation (position modulation) and intensity modulation for
laser beam by means of frequency modulation and amplitude modulation.
The acousto-optic tunable filter can select diffracted light wavelength by means of frequency modulation and can
modulate output intensity by means of amplitude modulation.
Some specifications of AO devices can be optimized according to the needs/purpose of customers.
Please contact us for further details.
Safety Precautions
(Common precautions for Acousto-Optic Devices)
◊ When using our products, no matter what sort of equipment they might be used for, be sure to make a written
agreement on the specifications with us in advance.
◊ Do not use the products beyond the specifications described in this catalog.
1. Falling Shock
As single crystal or glass is used as medium for acousto-optic devices, care shall be taken not to give a falling
shock to prevent breakage of the devices.
2. Electrical Input (Driving Power)
The electrical input power shall not exceed the specified maximum driving power to prevent
breakage of the crystal.
3. Laser Input Beam
Polarized light conditions of laser input beam differ in accordance with the input equipment types.
Operate at the specified polarized light.
Exercise caution as the light input of 1 W/mm2 or more can not be applied in some cases.
4. Dewing
Dewing on optical surfaces of the medium causes stain, thus deteriorating the light transmittance.
5. Installation
Use fixing screws and bragg adjusting rotating axis with the allowable depth of the fixing taps or the
rotating center hole specifed in the product diagram or more.
6. Environmental Conditions
The AODs shall not be operated and/or stored under following environmental conditions:
a) To be exposed directly to water or salt water
b) Under conditions of dew formation
c) Under conditions of corrosive atmosphere such as hydrogen sulfied, sulfurous acid, chroline and ammonia.
7. Long Term Storage
The AODs shall not be stored under severe conditions of high temperatures and high humidities. Store them
indoors under 40 °C max. and 75 %RH max. with no dew formation.
<Package markings>
Package markings include the product number, quantity, and country of origin.
In principle, the country of origin should be indicated in English.
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
Definition of Terms
Terms
Definition
Center Frequency: fo
Driving frequency at light modulator and the center frequency of deflection bandwidth at
light deflector.
Modulation
Bandwidth: Δ fi
This is calculated via following equation using response (tr)
Δ fi=0.35/tr
Diffraction Efficiency
Ratio of the first-order diffracted light intensity (I1) and the 0th diffraction intensity with no
driving power (Transmitting light intensity) (I00) I1/I00 (%)
Rise time at pulse modulation (10 to 90 %)
With the pulse response of electric system (te) included, the total response time (ts) is
ts=√ te2+tr2
(%)
90
Pulse Response: tr
10
tr
Extinction Ratio
Ratio of the maximum first-order diffracted light intensity and the optical intensity in the
same direction with no driving power.
Number of Resolvable
Spots: N
Ratio of the deflection angle Δ q=l Δ f/u and the extending angle of optical beamΔ qb=l/D
D 1
1 Δq 1
= · Δf · = · Δf · t
N= ·
u g
g Δqb g
l : Optical Wavelength
D : Diameter of input laser beam
Δ f : Defection Bandwidth
g : Coefficient in accordance with optical beam shape
u : Acoustic Velocity of medium
t : Access Time
Access Time: t
Time for acoustic wave to pass optical beam
t=D/u
Deflection Bandwidth: Δ f
Driving frequency range where first-order diffracted light intensity is half of the maximum
value (–3 dB).
Deflection Angle: Δ q
Diffraction angle in accordance with deflection bandwidth
Δ q=l Δ f/u
Resolution
Extention of filter light wavelength with the constant driving frequency at acousto-optic
tunable filter.
Dispersion of Deflection
Angle
Wavelength dispersion of diffracting direction(angle) in the range of optical wavelength at
acousto-optic tunable filter.
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
Application Examples
(Light Modulator)
Cleaning
Laser
Laser
Charging
Polygon
Lens
u
Lens
Photo Detector
Transferring
f·q Lens
Lens
Light Modulator
Beam Splitter
Sensitive
Drum
Flow Cell
Slit
mirror
Light Modulator
Fixing
Lens
High Freq. Signal
Developing
Signal Processor
Laser Doppler Velocity Meter
Laser Printer
(Light Deflector)
AOD
AOD
Laser Beam
Laser Beam
Diffracted Light
Diffracted Light
0 th.Light Stopper
0 th.Light Stopper
Amp
Amp
VCO
VCO
Input Signal
Input Signal
Laser Beam Random Access Scanner
Laser Beam Sweep Scanner
AOD
Lens
Image Sensor
Laser Beam
Computor
0 th.Light Stopper
Amp
Input Signal
Mixer
Local Oscillator
Spectrum Analyzer
(Acousto-Optic Tunable Filter)
Color Original
Drum
Monochromatic Light
Electrical Signal
Acousto-Optic Tunable
Filter EFL-F20
Photomultiplier
Amp.
Changing-Over
Switch
Memorized
Standard Signal
RF Amp.
Differential
Amp.
White Light Source
Sweep
Oscillator
Trigger Gate
Circuit
Color Analyzed Signal
Schematic Diagram of a Color Analyzer
System Using Acousto-Optic Tunable Filter
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
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
Acousto-Optic Devices
Acousto-Optic Light Deflectors
Type: EFLD
Acousto-Optic Light Deflector deflects laser beam
by using shear-mode acoustic waves travelling in a
single crystal of tellurium dioxide (TeO2), whereby flat
frequency response and light deflection characteristics
of high diffraction efficiency are obtained with low
driving power. Panasonic’s unique system is employed
for this deflector, thus eliminating the need for an optic
phase plate even for two dimensional deflection, and
simplifying the optical system.
Features
● Low
driving power (0.5 to 1 W)
density of resolvable spots (160 to 750 spots)
● High diffraction efficiency (over 80 %@633 nm)
● Wide deflection angle (over 2.7 °@633 nm)
● RoHS compliant
● High
Recommended Applications
● Laser
scanner
microscope
● Electrical spectrum analyzer
● Laser
Principle
Light Deflectors
TeO2 crystal
Incident
laser
beam
Absorber
f2
f1
<110>
} diffracted light
0 th diffracted light
<001>
Acoustic wave
Transducer
f1 to f2
Oscillator
Explanation of Part Numbers
1
2
3
4
E
F
L
D
Product Code
5
6
7
Characteristics
(Number of Resolvable
Spots)
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
Part No.
Item
EFLD250
EFLD250A
AO Medium
EFLD250C
EFLD250R
TeO2
Optical Wavelength: l (nm)
633
488 to 515
442 to 458
760 to 840
250 min.
250 min.
250 min.
160 min.
5.3
5.4
5.4
4.5
3.5×3.5
3.5×3.5
3.5×3.5
3×3
Acoustic Velocity: u (m/s)
660
650
650
660
Center Frequency: f (MHz)
75
90 (l=515 nm)
100 (l=488 nm)
103 (l=458 nm)
108 (l=442 nm)
55
Deflection Bandwidth (–3 dB): Δ f (MHz)
50 min.
50 min.
50 min.
36 min.
Maximum Diffraction Efficiency (%)
80 min.
80 min.
70 min.
75 min.
Maximum Driving Power (W)
0.6
0.5
0.5
1.0
Deflection Angles: Δ q (deg.)
2.7 min.
2.2 min.
2.0 min.
2.5 min.
Optical Transmittance (%)
94 min.
92 min.
90 min.
90 min.
Number of Resolvable Spots (Spots)
Access Time (μs)
Maximum Beam Dimensions: H×W (mm)
Input Impedance (Ω)
50 (nominal)
Laser Polarization
Linear (Horizontal to the base: E Vector)
Part No.
Item
EFLD750
EFLD750A
AO Medium
Optical Wavelength: l (nm)
Number of Resolvable Spots (Spots)
Access Time (μs)
EFLD750C
EFLD750R
TeO2
633
488 to 515
442 to 458
760 to 840
750 min.
750 min.
750 min.
540 min.
15.2
15.4
15.4
15.2
Maximum Beam Dimensions: H×W (mm)
3×10
Acoustic Velocity: u (m/s)
660
650
650
660
Center Frequency: f (MHz)
75
90 (l=515 nm)
100 (l=488 nm)
103 (l=458 nm)
108 (l=442 nm)
55
Deflection Bandwidth (–3 dB): Δ f (MHz)
50 min.
50 min.
50 min.
36 min.
Maximum Diffraction Efficiency (%)
80 min.
80 min.
70 min.
75 min.
Maximum Driving Power (W)
0.6
0.5
0.5
1.0
Deflection Angles: Δ q (deg.)
2.7 min.
2.2 min.
2.0 min.
2.5 min.
Optical Transmittance (%)
94 min.
92 min.
90 min.
90 min.
Input Impedance (Ω)
Laser Polarization
50 (nominal)
Linear (Horizontal to the base: E Vector)
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
Dimensions in mm (not to scale)
Type EFLD250
Type EFLD750
Aperture f6
30.4
Aperture
45
53
20.4
21
10.2
Base
32
15
Connector(SMA)
4-M2.6(ISO)
Depth4
f3 Depth4
20.4
25.0±0.1 10
32
45
53
14.0±0.1
f3 Depth4
14.0±0.1
Base
21
10.2
5
30.4
connector(SMA)
4-M2.6(ISO)
Depth4
25.0±0.1 10
■ Please contact the factory for packaging methods.
Diffraction Efficiency
Type EFLD750
Diffraction Efficiency(%)
Typical Characteristics
45
75
Frequency(MHz)
105
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
Acousto-Optic Tunable Filters
Type: EFLF
Acousto-Optic Tunable Filter uses an anisotropic
diffraction of light occuring with shear-mode acoustic
waves travelling in a single crystal of tellurium dioxide
(TeO 2 ), which is a high speed spectral element
selecting optical monochromatic light from multicolor at
high speed.
Features
● Low
driving power (0.5 to 1.0 W)
spectrum scanning (6 to 9 μs)
● Wide optical tuning range (380 to 750 nm)
● High spectrum resolution (0.4 to 2.3 nm)
● RoHS compliant
● Rapid
Recommended Applications
● Rapid
● Color
scan spectrum analyzer
decomposition
Principle
Tunable Filters
TeO2 crystal
Absorber
Incident light
2
1
1
3
2
Acoustic wave
3
Tuned light l1
Untuned light
Tuned light l1+Dl
f1 Oscillator
Transducer
Explanation of Part Numbers
1
2
3
4
E
F
L
F
Product Code
5
6
Characteristics
(Resolution)
7
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
Part No.
EFLF20
Item
EFLF100L1
AO Medium
EFLF100R1
EFLF100R2
TeO2
Optical Tuning Range:l (nm)
380 to 750
400 to 642
900 to 1600
1600 to 3000
Resolution for Slow Scan (nm)
0.4 to 2.3
1.4 to 6.3
4 to 12
12 to 41
Maximum Diffraction Efficiency (%)
(Extraordinary Light or Ordinary Light)
80 min.
Access Time (μs)
(Beam Dimensions: mm)
70 min.
9 max.
(3×5)
6 max.
(3×4)
Dispersion of Deflection Angle for Filtered Light (deg.)
(Extraordinary Light) (mrad)
0.5 max.
0.3 max.
Driving Frequency Range: f (MHz)
40 to 110
50 to 105
39 to 72
20.5 to 39
1.0
1.0
1.0
3.0
Maximum Drive Power (W)
Input Impedance (Ω)
50 (nominal)
Maximum Beam Dimensions (mm) (H×W)
3×5
3×4
Dimensions in mm (not to scale)
Type EFLF
Aperture
10.2
21
5
30.4
Base
11
32
45
53
f3 Depth4
14.0±0.1
connector(SMA)
4-M2.6(ISO)
Depth4
20.4
25.0±0.1
Unit : (mm)
10
■ 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
Frequency vs. Optical Wavelength
3000
650
780
EFLF20
Ordinary Light
Extraordinary Light
EFLF100R1,R2
EFLF100L1
600
2500
580
480
Optical Wavelength (nm)
Optical Wavelength (nm)
Optical Wavelength (nm)
680
550
500
2000
1500
450
1000
380
40
50
400
50
60 70 80 90 100 110
Frequency (MHz)
60
70
80
90
Frequency (MHz)
10
100
20
30 40 50 60
Frequency (MHz)
70
80
Resolution
Resolution
5
Resolution(nm)
Resolution (nm)
EFLF20
0
380
480
580
680
780
8
7
6
5
4
3
2
1
0
EFLF100L1
400
450
500
550
600
650
Optical Wavelength(nm)
Optical Wavelength (nm)
50
Resolution(nm)
EFLF100R1,R2
0
1000
1500
2000
2500
3000
Optical Wavelength(nm)
Spectra of a Mercury Lamp Observed by Rapid Specturm
Scanning with EFLF20
690.9 579.2 546.2
577.1
491.7 436.0 434.9 408.0
404.8
Wavelength l (nm)
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
Driving Units for AO Devices
Signal Processors
Type: EFLC
This Signal Processor provides the required driving
power to the Acousto-Optic Light Modulators (Type
EFLM).
Ratings and Characteristics
Part No.
EFLC200P25W
Item
Carrier Frequency (MHz)
200
Carrier Leak (dB)
–30 max.
Pulse Response Time (ns)
10 max.
Input
0 to +2 V
Output Power (W)(50 Ω load)
0.9±0.1
+24 VDC
700 mA max.
Power Supply
Modulation Pulse AM
AM
Dimensions in mm (not to scale)
Type EFLC200P25W
75
26.6
89.0±0.5
OUTPUT +24V INPUT
100
2-f4.5
85
■ 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