Amplifier

For investigating Ponderomotive effects, we may need ~100 kW circulating in the arm cavities. For this, we are looking at getting an amplifier to boost the 1W input we have right now.

Some formal quotes / info from talking to sales reps:

1. After talking with NeoLase, one candidate is the NeoVan-2S-HP.

   • 25k euro.
   • 30W out for 1W in.

   • Quote and specs: Quote.

   • Paper about this amplifier performance: OL.44.000719

   • Optional air cooling in case we want to avoid water cooling.
   • Need to confirm that the amplifier can be integrated with out Acromag slow control system.

2. Quote from Optical Engines:

   • Quote_opticalEngines

   • 50k$
   • maybe we can have something cheaper if we supply 1W instead of their spec of 30 mW?

3. Spoke with rep from NPphotonics - expected quote is <$30,000 for an amplifier only.

4. NuFern (now Coherent) does not make amplifiers anymore, only MOPA.

5. IPG Photonics YAR-LP-SF

   • 30 W output for 5 mW input

   • ask them about 500 mW -> 30 W (44 k$)

   • quote: 30 W amplifier

[[Amplifier/PowerCalc | Power Calculation]]

P_arm = Plaser * T_PMC * T_IMC * T_FI * alpha_MM * G_PR * T_BS * G_arm

(Gautam put some numbers here for the terms please)

1. What should our PMC Finesse be so that its barely enough to satisfy filtering reqs and transmission efficiency?
   • Suppress angular modes by XX

   • Suppress laser noise at the 11 & 55 MHz readout frequencies by XX

   • Maintain a T_PMC > 0.9X

2. What's up with our T_IMC ?
   • let's clean the IMC mirrors
   • what's the MM frac between PMC and IMC?
3. Is our T_FI too low?
   • measure this during the vent when we clean the IMC
4. What is the loss in the PRC?
   • clipping in the PRC
   • new PR/SR mirrors

Why Fiber and not Free Space ?

Because fiber seems to be the way of the future...

What's the price / ease-of-use difference for the free space vs fiber?