Cavity beam Image , posted by Manar Amer at ThomX igloo about lasers and optics 
|
Updated beam image after change on the mode axis.
Taken after P4. |
|
First hands on the Alphanov amplifier & software, posted by Ronic Chiche at ThomX igloo about lasers and optics
|
Aurélien, Manar, and I spent more than 2h trying to start the software communicating with the Alphanov amplifier controller.
each time, we had a problem with the software, asking to switch OFF and ON the controller before being able to switch the amplifier diodes ON.
we switched OFF and ON many times without any success. |
First hands on the Alphanov amplifier & software, posted by Ronic Chiche at ThomX igloo about lasers and optics
|
Additional information related to the injected power into the amplifier fibers.
power = 4.45 mW (as shown from the software)
the minimum to inject into amplifier is 2 mW |
|
Current Installed Setup, posted by Manar Amer at ThomX igloo about mechanics | lasers and optics | detectors and electronics
|
| Attached is the current setup in ThomX |
|
Alphanov amplifier power measurement, posted by Ronic Chiche at ThomX igloo about lasers and optics
|
This morning, with Manar and Aurélien, we measure the power directly at the output of the Alphanov amplifier with the 2 compressors CVBG
(seeding laser at Frep = 133MHz)
(we had to remove the base plate where the deflector mirrors were mounted to put the large powermeter). |
|
Alphanov amplifier power measurement, posted by Ronic Chiche at ThomX igloo about lasers and optics
|
answers from Guillaume:
- the chiller temperature has to be set to 25°C
- the power measured with the software can change a little from what Alphanov measured with their laser. |
|
Alphanov amplifier Beam Profile, posted by Manar Amer at ThomX igloo about lasers and optics 8x
|
Today: Manar, Ronic and Aurlien started the study of the beam profile of the alphanov amplifier at high power.
The setup shown in the image shows how the power is reduced by using Anti-reflective mirrors,
pick up 1 : Anti-reflective coating on both sides , pick up 2 : Anti-reflective coating on one side and High |
|
Alphanov amplifier Beam Profile, posted by Manar Amer at ThomX igloo about lasers and optics
|
Manar
Amer wrote:
Today: Manar, Ronic and Aurlien started the study of the beam profile |
|
Alphanov amplifier Beam Profile, posted by Manar Amer at ThomX igloo about lasers and optics 6x
|
Adding the fitted beam in 1D in Horizontal and vertical axis.
for 10% to 60%
Manar |
|
Alphanov amplifier Beam Profile, posted by Manar Amer at ThomX igloo about lasers and optics
|
Today a second reading of the beam profile was done , with Victor ,Ronic, Aurlien and Manar
an additional set-up was made using two 4 deg wedges instead of High reflecting (HR) and Anti-reflecting (AR) mirrors.
Two reading were taken: |
|
Alphanov amplifier Beam Profile, posted by Manar Amer at ThomX igloo about lasers and optics 9x
|
Readings of the beam shape and horizontal (upper plot) and vertical (lower plot) axis fit at the direct output of the amplifier.
The beam shape relatively shaped like an egg.
Manar |
|
Alphanov amplifier Beam Profile, posted by Manar Amer at ThomX igloo about lasers and optics
|
Readings of the beam shape and fit at the output of the compressor
differance from previous reading is that here we used wedges instead of HR mirrors.
Similar to previous readings, the beam shape deforms and the Gaussian fit is bad after 50% amplification |
|
Alphanov amplifier Beam Profile, posted by Manar Amer at ThomX igloo about lasers and optics 6x
|
Adding the readings 20% , 30% , 40% for output of amplifier after the compressor
Manar |
|
Alphanov amplifier Beam Profile, posted by Manar Amer at ThomX igloo about lasers and optics 12x
|
This Morning, another reading was taken for the output of the amplifier after the compressor using 2 wedge mirrors.
In addition, a start of the calibration of a PulseCheck "Autocorrelator" to measure the pulse duration.
note, the pulsed laser used is OneFive 133.33 MHz |
|
First hands on the Alphanov amplifier & software, posted by Ronic Chiche at ThomX igloo about lasers and optics
|
Software Works well and is operational.
Just closing the log series!!!
Ronic |
|
Alphanov amplifier Beam Pulse Duration, posted by Manar Amer at ThomX igloo about lasers and optics
|
The pulse duration from the amplifier compressor output will be measured using PulseCheck autocorelator
a first alignment of the device was done, continuation in the afternoon.
YouTube link attached of the general operation of pulse check < 5 min : https://www.youtube.com/watch?v=J1pNHYySSYg |
|
Alphanov amplifier Beam Pulse Duration, posted by Manar Amer at ThomX igloo about lasers and optics
|
Measurement of the pulse was done at the end of the afternoon, Pulse Duration FWHM = 12.9 ps
After a long process of adjusting the alignment and angle of the crystal inside the device
The power input on the PulseCheck device should be above the sensitivity, in our case we had 1 mW input. |
|
Alphanov amplifier Beam Pulse Duration, posted by Manar Amer at ThomX igloo about lasers and optics
|
Pulse Duration FWHM = 12.9 ps
Manar
Amer wrote:
Measurement of the pulse was done at the end of the afternoon, Pulse |
|
Alphanov amplifier Beam Profile, posted by Manar Amer at ThomX igloo about lasers and optics 20x
|
Victor, Ronic, Manar
Today was dedicated to the study of the CVBG, and it's effect on the beam profile
we opened the box containing the 2 CVBGs : The 2CVBG are glued from the bottom on a copper surface . |
|
Alphanov amplifier Beam Profile, posted by Manar Amer at ThomX igloo about lasers and optics 8x
|
For better comparison ,
the measurements done previously with 2 CVBGs was done at ~ 30 cm and the one done on Friday was for 1 CVBG is at 1 m
so we did additional measurement for 2 CVBGs at 1 m, for 20 , 50 and 70 % amplification |