High-Accuracy Laser RIN Measurement
made simple with RT-40 instrument.
The example above was taken with RT-40 and Agilent 4407 ESA.
RT-40 converts the ESA you already own into a high-accuracy RIN measurement system.
"RIN standard" calibration eliminates fake peaks and enables
correct measurements close to shot noise. Here, primitive "DC" calibration underestimated RIN by 10 dB.
RT-40 Specifications
| Wavelength* | 1260-1650 nm |
|---|---|
| Bandwidth* | 0.1 MHz - 43.5 GHz |
| RIN sensitivity | below -164 dB/Hz |
| Optical input* | SM FC/APC, ≤ 10 dBm, any polarization |
| RF Output* | K (2.92mm F), SMA compatible |
| Comm. Interface | USB-A, Ethernet |
| Dimensions | 2U half rack: 8.5” (W) × 3.5” (H) × 14.6” (L) |
*Can be customized.
How It Works
We provide an optional laptop that controls both RT40 and your ESA to quickly start measuring RIN. The RT-40 can also be part of your test rack, remotely controlled with VISA-type commands. The video below shows how a $260 TinySA ESA can be used to measure RIN with shot-noise-limited sensitivity.