Transmission Measurements for the Mirrors. , posted by Manar Amer at Optical room about lasers and optics 6x
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Thursday 10 December 2020: First Test Measurement - Inside Box
The transmission ( T ) for the mirrors of SBOX
and ThomX was measured over a range from the center of the mirror up to 5mm.
The first setup was initially done while the
mirrorr is installed inside the metal box, when measuring T we observe that there is an erregular change in the power measured as we move azay from |
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Origami SN2440 133MHz laser power measurment... and failure, posted by Ronic Chiche at Optical room about lasers and optics
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we received from NKT the Origami SN2440 133MHz oscillator from repair on 2020/12/17
and we measured the power trend from 2020/12/21 until the whole winter Hollyday, during 14 days and 17h (1 273 334 s).
the power was quite constant, about 58mW (the measurement has been done with the OD2 filter and using a (x20) factor in the software to compensate |
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Origami SN2440 133MHz laser tests, posted by Ronic Chiche at Optical room about lasers and optics
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Today, we received the Origami SN2440 133MHz oscillator from repair (NKT mentioned a defective wire inside the controller....)
We immediately installed it behind an isolator (Faraday rotator+PBS+halfwave plate).
the output power is around 60mW. |
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OEwaves CW Laser - Phase Noise , posted by Manar Amer at Optical room about lasers and optics | detectors and electronics
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We started measuring the phase noise on the OEwaves CW laser.
Class 3b
wavelength 1.5 um
The
procedure is done using self coupling of the laser
splitter 50%-50%\
delay line 100 m
all fibers are PM type
(polarity maintained)
Photodetector is "lab buddy", very fast diode.
Note: différance from schematic (we did not |
OEwaves CW Laser - Phase Noise , posted by Manar Amer at Optical room about lasers and optics | detectors and electronics
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a correction on the wavelength of the laser it is 1030 um
Manar
Amer wrote:
We started measuring the phase noise on the OEwaves CW laser.
Class |
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OEwaves CW Laser - Phase Noise , posted by Manar Amer at Optical room about lasers and optics | detectors and electronics
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correction on unit 1030 nm
Manar
Amer wrote:
a correction on the wavelength of the laser it is 1030 um |
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Dust Cleaning of SBox, posted by Manar Amer at Optical room about utilities
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An Initial cleaning of the KBoX outside was done, All the optics and mechanics placed that were on the table were removed.
Only the old Mitylaser amplifier remains on the table.
Since we will be using the ThomX Celia amplifier, we will remove it and place it in a secure location (to be decided). |
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Dust Cleaning of SBox, posted by Manar Amer at Optical room about utilities
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The cleaning was done twice with half an hour interval between the two times
reading on the dust meter was taken after each time, and it was zero averaged over a 10-min
Manar |
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Mightylaser Amplifier , posted by Manar Amer at Optical room about lasers and optics | cabling
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Migthylaser amplifier has been moved from the SBox table to the PLIC table.
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Spincoater - Mirrror cleaning , posted by Manar Amer at Optical room about utilities
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In preparation for cleaning the mirrors.
The spincoater has been moved with its bump into the sas of the SBox.
The pure water used will be provided by Alice, as the previous source in the workshop is not available. |
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Dust Cleaning of SBox, posted by Manar Amer at Optical room about mechanics | lasers and optics | utilities 6x
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The inside of the cavity was cleaned today. It was very dirty and had big dust particles and fibers inside.
Cleaning was done for everything; wall, floor, fixed mounts, wires (still have some dust difficult to remove), edges.
The dust meter average was measured outside the cavity (2471 p/m3 av 6 min) and inside after cleaning (1424 p/m3 av 10 min). |
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Dust Cleaning of SBox, posted by Manar Amer at Optical room about mechanics | lasers and optics | utilities
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After an overnight where the cavity box was left open, a measurement of the Dust meter was taken:
Outside on the optical table on direct air flux (1701 p/m3 Av 10 min) and
Inside the cavity box (998 p/m3 Av 10 min) |
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Clean Airflow Dust measurements, posted by Manar Amer at Optical room about detectors and electronics | utilities
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The dust meter cap was cleaned using Alcohol, and using the filter white cap the dust count was (0 Av. 10 min)
After the dust counter was hand held in direct airflow, it counted (1581 p/m3 Av. 2 min).
I tested the count also in the SAS, and it counted twice the amount ~ 4500 p/m3 |
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Clean Airflow Dust measurements, posted by Manar Amer at Optical room about detectors and electronics | utilities
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Dust measurement done today on top of the SBox average 10min
Manar
Amer wrote:
The dust meter cap was cleaned using Alcohol, and using the filter white |
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Spincoater - Mirrror cleaning , posted by Manar Amer at Optical room about lasers and optics | utilities
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Used the spincoater and pure water to clean dielectric mirrors which will be installed inside the SBox for directing the reflection line.
The method : place pure alchole on mirror - wipe it using white sterile tissue (in one direction) - clean with pure water in spincoater suing
cotton swap . |
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KBox Alignment , posted by Manar Amer at Optical room about lasers and optics 7x
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Starting with the alignment of the KBox using CW Koheras.
The size of the CW output from the collimator at 1 meter from is ~ 2.4 mm, to be adjusted with lenses to match the cavity !!! (attached
image) |
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SBox Alignment , posted by Manar Amer at Optical room about lasers and optics 6x
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SBox alignment, using CW laser Koheras power 1 mW
Finished M1 and M2 alignment using the diffraction patterns seen on the beam profiler,
the beam fit is not very good ?? (image taken)
Positions of Ma1 and Ma2 motors are |
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SBox Alignment , posted by Manar Amer at Optical room about lasers and optics
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After pointers and Advice from Aurélien,
improvement of the beam alignment through M1 and M2 irises was done.
To improve the image on the beam profiler, I cleaned the alignment mirrors and the windows using pure ethanol and optical lens cleaning tissue, |
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SBox Alignment , posted by Manar Amer at Optical room about lasers and optics
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Remember to update the position of the reference Irises tomorrow !!!!
Manar
Amer wrote:
After pointers and Advice from Aurélien, |
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SBox Alignment , posted by Manar Amer at Optical room about lasers and optics 9x
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Adjust the placement of the Irises (done at the start of the day, adjusted at the end
when M1 mirror was placed)
Improvement on the
Ma1 and Ma2 (The Alignment Mirrors)
Improves the alignment a bit. There is an observation where there |