Features
● Support one-key restore function (no need to restart and preheat).
● Software remote control, intelligent control.
● Stable output power, continuously adjustable.
● Compact structure.
● High-precision ACC and ATC control circuit.
● Built-in high and low modulation bandwidth BNC interface.
Specifications
Features | Min. | Max. | Unit | Note |
Power supply voltage | 100V | 240 | VAC |
|
Power | 5 | 15 | W |
|
Modulation low frequency | 20 | 1000 | KHz |
|
Modulation high frequency | 100 | 1000 | MHZ |
|
Laser drive current | 0 | 500 | mA |
|
Laser drive voltage | 2.5 | V | @80mA |
|
NTC | 9.7 | 10.3 | Kohm | @25°C |
TEC current | -1 | 1 | A |
|
Temperature control range | 0 | 50 | oC |
|
Analog input (peak-to-peak value) | 0 | 5 | V | AC-COUPLED |
Analog output | 0 | 2.5 | V |
|
Dimensions | 22.5X15.0X6.5 | 22.5X15.0X6.5 | mm3 |
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Fiber optic interface | 2-port FC/APC interface | 2-port FC/APC interface |
|
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Low Freq: SOA external current modulation input, supports 0~40MHz frequency signal, minimum signal pulse width 10ns.
USB: Communication interface with computer.
AC 220V: Power cord.
Power: Device switch.
Fiber Fix: Seed light input.
Fiber Out: Modulated light output
Operating process
1. Connect the AC 220V power cord, connect the USB cable to the PC, press Power, and start the SOA driver.
2. Open the SOA driver on the PC and press Connect to connect the SOA driver device. Observe that the device model appears in the upper right corner, and the connection is successful. Observe that the LD Actual
Temp temperature and the LD Temp Setpoint temperature are consistent, indicating that the temperature control is working properly. Modify the LD Temp Setpoint temperature value and press Set Temperature to change the SOA operating temperature, but generally 25℃ is sufficient. As shown below:
3. Control the seed light to be input into SOA to about 1mW and insert Fiber Fix. Then use a fiber jumper to connect Fiber Out and connect the other end to the optical power meter.
Observe that there is no current inside SOA at this time, and the seed light will not be amplified, but a weak seed light power may be observed on the power meter.
4. On the software interface of the PC, first pull the Start progress bar to the minimum (81mA), then pull the Limit to 500mA (the current limit of SOA), press Set Parameters,
then press Run: DC to inject the minimum current of 81mA into SOA.
The value of Start is the current value injected into SOA. Slowly increase the value of the Start progress bar. Press Set Parameters every time you drag it, and the modification will take effect.
You can observe that the optical power on the power meter gradually increases, and the optical power at 500mA is about 30mW. So far, we have realized the optical power amplification function of SOA.
Optical modulation:
As mentioned above, the value of Start is the current value injected into SOA, which is only when there is no external signal input. When the voltage value Vset is input to the Low Freq port, the current value of SOA is equal to the value of Start plus Vset×400. For example, after adding a voltage value of 1V (50Ω impedance) externally, the actual current value is 400×1+81=481mA (there will be errors with the actual situation, it is recommended to calibrate it yourself before using modulation). Using this function, we input a modulation signal to the Low Freq terminal, and then we can perform amplitude modulation on SOA, which plays the role of an optical switch.
SOA modulated optical time domain signal diagram under 40MHz square wave modulation signal input
