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2016-07 
 
 
 
 
 
 

Acousto-Optic Modulator Driver  

Including:  Basic Modulator Alignment  
 
 

Instruction Manual

 

750c Series – Analog and Digital  
                       Dual Modulation  
                        

 

Key to model types :      

75o.C-m-ff

   

 

Base model features TTL buffer compatible modulation input level and 24/28Vdc supply. 

  

 

‘o’ indicates the base models standard frequency 

              

:  

40MHz 

 

 

 

80MHz 

 

 

 

110MHz 

 

 

 

150MHz 

 

 

 

200MHz 

 

 

 

250MHz 

 
 

 

‘C’ indicates case style 

 
 

and where appended,  

 
 

 

‘m’ indicates options  (combinations possible) 

 

 

 

2 Watt output 

 

 

 

3 Watt output 

 

 

 

4 Watt output 

 

 

 

6 Watt output 

 

 

 

  

 

 

 

+15V supply operation  

 
 

 

‘ff’ indicates non-standard frequency e.g. 

 

 

 

 

 

 

 

50 

50MHz 

 

 

 

120 

120MHz 

 

 

 

 

 
 

ISOMET CORP, 5263 Port Royal Rd, Springfield, VA 22151, USA. 

Tel:  +1 703 321 8301,  Fax: +1 703 321 8546,  e-mail: 

isomet@isomet.com

 

www.ISOMET.com

 

ISOMET (UK) Ltd, 18 Llantarnam Park, Cwmbran, Torfaen, NP44 3AX, UK.  

Tel: +44 1633-872721,  Fax: +44 1633 874678,  e-mail: 

isomet@isomet.co.uk

  

ISOMET

 

Summary of Contents for 750c Series

Page 1: ...z 4 150MHz 5 200MHz 6 250MHz C indicates case style and where appended m indicates options combinations possible 2 2 Watt output 3 3 Watt output 4 4 Watt output 6 6 Watt output L 15V supply operation...

Page 2: ...erature stabilized A high frequency diode ring mixer and RF analog switch are used to modulate the RF carrier according to the signals applied to the D mod TTL and A Mod analog modulation inputs D Mod...

Page 3: ...operation The required voltage is 24 28Vdc at a current drain of approximately 470mA EXCEPT model 750c L This lower power driver operates from 15Vdc The external power source should be regulated to 2...

Page 4: ...NOT EXCEED 15Vdc or apply reverse polarity 3 3 Connect the RF output SMA jack to an acousto optic modulator or 50 RF load if it is desired to measure the modulator RF output power 3 4 a Connect a TTL...

Page 5: ...Observe the diffracted first order output from the acousto optic modulator and the undeflected zeroth order beam Adjust the Bragg angle rotate the modulator to maximise first order beam intensity Note...

Page 6: ...th a soft ball of brushed short fibres removed cotton slightly moistened with clean alcohol Before the alcohol has had time to dry on the surface wipe again with dry cotton in a smooth continuous stro...

Page 7: ...SMB SMA Mounting Flange to Heatsink Apply Thermal Compound Max Temp 70deg C D Mod Figure 1 Driver Installation Vdc Vcc o Gnd En Out Vcc D Mod Input PA Transistor Pre Amp RF Output Mixer RF SW Oscilla...

Page 8: ...on shown above D Mod constant 5V TTL high The modulation input is a combination of BOTH analog and digital control as illustrated below Figure 3 Typical Modulation Waveforms Peak Level set by driver P...

Page 9: ...n the plane of deflection is BRAGG fc 2 v The separation angle between the zeroth order and the first order outputs is SEP fc v Optical rise time for a Gaussian input beam is approximated by tr 0 65 d...

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