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| 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. | For investigating Ponderomotive effects, we may need ~100 kW circulating in the arm cavities. For this, we --are-- were looking at getting an amplifier to boost the 1 W input we have right now. Now we have decided to go with the following setup: 1. RIO Planex (1064 nm) as master oscillator; output ~ 20 mW, see [[RIO_Laser|datasheets]]. * Commercial (Thorlabs) temperature controller * Thorlabs butterfly package * How to package for low acoustic sensitivity? * Use the latest version of Johannes/Luis/Rich diode driver for driving the current and locking to the IMC. Make sure to order 2 units from Luis. * Need fiber to free space thing with low AR / good polish * Fiber based PM for locking to IMC w/ high bandwidth. * Fiber based AM for intensity servo 1. 1-2 stage CW fiber amp to take us to > 20 W |
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| 1. Quote from OpticalEngines: [[attachment:opticalEnginesQuote.pdf|Quote_opticalEngines]] | 1. Quote from [[http://www.opticalenginesinc.com/products/amplifiers|Optical Engines]]: * [[attachment:opticalEnginesQuote.pdf|Quote_opticalEngines]] |
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| 1. NuFern (now Coherent) does not make amplifiers anymore, only MOPA. | * Re-contacted them on 25 June 2019, waiting for a response. * Rana contacted Arturo on --(June 25)-- Aug 7; waiting for reply. 1. Nu''''''Fern (now Coherent) does not make amplifiers anymore, only MOPA. |
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| * quote: [[attachment:30 W amplifier]] | * quote: [[attachment:amplifier.pdf]] 1. IPG Photonics fiber amplifier for a low power seed: * 20W output with 3 mW input * Johnny Poon says its $35k * [[attachment:quote20.pdf | YAR-20 ]] 1. [[www.rpmclasers.com/product-category/laser-amplifiers/|RPMC lasers]]: * $15k for 20 W. [[https://www.rpmclasers.com/product-category/laser-amplifiers/?swoof=1&pa_wavelength=1064nm&really_curr_tax=3188-product_cat| 1064 FC amplifiers]] * if we use a 20 mW seed, they add a pre-amp (cost increase by ~2.5k$) * contact - Shawn Smith 1. [[https://www.amonics.com/product/26| Amonics]] * Got in contact with them today (25 June 2019), waiting for a response ----- Commentary from Rana (Aug 7, 2019): * The NeoLase stuff is probably the highest quality, but also expensive? |
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| ==== Power Calculation ==== P_arm = Plaser * T_PMC * T_IMC * T_FI * alpha_MM * G_PR * T_BS * G_arm |
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| (Gautam put some numbers here for the terms please) | ==== Power Calculation ==== |
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| 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 1. What's up with our T_IMC ? * let's clean the IMC mirrors * what's the MM frac between PMC and IMC? 1. Is our T_FI too low? * measure this during the vent when we clean the IMC 1. What is the loss in the PRC? * clipping in the PRC * new PR/SR mirrors |
See [[Laser / Amplifier / PowerCalc | Power Calculation]] page |
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If we continue with the 2W NPRO, we would use the free space amplifier, but its possible to use a RIO Planex with a fiber amplifier. |
Laser Amplifier
For investigating Ponderomotive effects, we may need ~100 kW circulating in the arm cavities. For this, we --are-- were looking at getting an amplifier to boost the 1 W input we have right now. Now we have decided to go with the following setup:
RIO Planex (1064 nm) as master oscillator; output ~ 20 mW, see datasheets.
- Commercial (Thorlabs) temperature controller
- Thorlabs butterfly package
- How to package for low acoustic sensitivity?
- Use the latest version of Johannes/Luis/Rich diode driver for driving the current and locking to the IMC. Make sure to order 2 units from Luis.
- Need fiber to free space thing with low AR / good polish
- Fiber based PM for locking to IMC w/ high bandwidth.
- Fiber based AM for intensity servo
1-2 stage CW fiber amp to take us to > 20 W
Some formal quotes / info from talking to sales reps:
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.
Quote from Optical Engines:
- 50k$
- maybe we can have something cheaper if we supply 1W instead of their spec of 30 mW?
Spoke with rep from NPphotonics - expected quote is <$30,000 for an amplifier only.
- Re-contacted them on 25 June 2019, waiting for a response.
Rana contacted Arturo on June 25 Aug 7; waiting for reply.
NuFern (now Coherent) does not make amplifiers anymore, only MOPA.
IPG Photonics YAR-LP-SF
- 30 W output for 5 mW input
ask them about 500 mW -> 30 W (44 k$)
quote: amplifier.pdf
- IPG Photonics fiber amplifier for a low power seed:
- 20W output with 3 mW input
- Johnny Poon says its $35k
$15k for 20 W. 1064 FC amplifiers
- if we use a 20 mW seed, they add a pre-amp (cost increase by ~2.5k$)
- contact - Shawn Smith
- Got in contact with them today (25 June 2019), waiting for a response
Commentary from Rana (Aug 7, 2019):
The NeoLase stuff is probably the highest quality, but also expensive?
Power Calculation
See Power Calculation page
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?
If we continue with the 2W NPRO, we would use the free space amplifier, but its possible to use a RIO Planex with a fiber amplifier.