[Shalika, Mitsuhashi-san]

This elog is about connecting the RF switch (Fig 1). In continuation to the experiment in elog, we realized that an RF switch is essential for the ringdown measurement. 

Details:

1. We first made sure that we had the correct supply of +5V and -5V using a multimeter. 

2. We then supplied a square wave of frequency 1Hz and 3 V amplitude to the TTL, using a function generator. The square wave signal was ensured with the use of an oscilloscope.

3. The analog input which was previously supplied to the RF driver (for AOM) was connected to the input of the RF switch. 

4. The output of the RF switch when the input is switched off is shown in Fig 2. 

Next Step:

1. Toggle the voltage of TTL for better shutdown for AOM. 

2. Connect the output of the RF switch to the RF driver of AOM. 

3. We test the response of photodiodes and select the better one for ringdown measurement.