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SOA Pulsed Driver: a GHz speed fiber modulator

SOA driven in pulse regime are a high dynamic range, lossless, high extinction ratio and highly polarizing solution available from 750 to 1700 nm.


Product reference: SOA

Fiber modulator basics

SOA pulsed driver datasheet



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Key features:

  • User-set pulse width from 0.5 ns to CW
  • High dynamic range : >48 dB, High extinction ratio : >~50 dB
  • Lossless device
  • Timing Jitter down to 8 ps ;
  • Repetition rate up to 250 MHz
  • User design pulse shape (SOA-shape only)
  • No wavelength variation along the pulse duration
  • Adjustable safety limits, current levels (average/peak), SOA temperature, etc.
  • USB & analog control.


It is a very compact unit optimized for single-shot to CW performance with pulse width lengths down to 1 nanosecond. This SOA Pulsed driver delivers precision pulses which are generated internally by an on-board pulse generator, or on demand from an external TTL signal. 


SOA (Semiconductor Optical Amplifiers) driven in nanosecond pulse regime can be compared with AOMs, EOMs or direct laser diode modulators (see comparative table). It is the only solution meeting all the constraints for a reliable, stable and efficient fibered modulation. 



It is an ideal solution to drive most of the commercially available SOA (Semiconductor Optical Amplifiers) like, for example, Innolume, Thorlabs, Superlum etc.

The GUI software lets the user have total control of all module functions. It includes several libraries for software integration (Labview VIs, DLLs, Hexa, Python etc.)


This SOA Pulsed Driver works alone or in series with other products in our range like:

Complex systems, such as fiber lasers, can be quickly developed on this module platform.

Turn-Key solutions which include the SOA (Semiconductor Optical Amplifiers) are also offered by Alphanov as a SOM (Semiconductor Optical Modulator).

Specifications :





(High Pulse


(Pulse shaping)

CW or Pulsed ?

CW or Pulsed

CW and/or Pulsed

Pulsed only


Output current (CW regime)


800 mA


2000 mA




Output current (Pulse regime)


1500 mA


4000 mA


1600 mA


Extinction ratio (dB,typ)(SOA choice dependant)


> 50 dB


> 40 dB


Switching speed (typ)(SOA choice dependant)


~1 ns


~0.5 ns


~2 ns


Dynamic Range (up to)


60 dB


60 dB


48 dB


Trigger-to-pulse Jitter


< 20 ps


< 8 ps


< 2 ns


Pulse shaping








Max repetition rate


10 MHz


250 MHz


20 MHz


Max Output Power (SOA choice dependant)


From 20 to 100 mW  (more than 500 mW have been measured in some pulsed configuration)


Interface/compatibilities and Libraries


USB - Windows 7/10 - DLLs - Hexa - Labview - Python










Operating Voltage (AC/DC converter included)



12 V


24 V


24 V


Example of a SOA-std 40 ns pulse shape from an input 1064 nm DFB laser diode.


Example of a user-defined pulse shape with SOM-std internal AWG from an input 1064 nm DFB laser diode.




PIN Configuration

GUI Interface


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