Spatial Light Modulator

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Tuto SLM/DMD

For more information you can visit Sebastien Popoff's website: Wavefrontshaping

How to SLM

In our experiments, we use the SLM package written by Tangui Aladjidi. It includes all the functions needed to display a pattern on the SLM: Package

Here is an example of its use
I want to inject the wavefunction of a planar soliton into my system. I know the wavefunction:
\(\Psi_s(x) = \sqrt{\rho}\left[ \sqrt{1-\frac{v^2}{c_s^2}} \textrm{tanh}\left( \frac{x}{\xi\sqrt{2}}\sqrt{1-\frac{v^2}{c_s^2}} \right) + i\frac{v}{c_s} \right]\).

I have the function in the SLM.py package:

def Soliton1D(m, n, y_val, Mach, xi, theta=90) -> np.ndarray:
    """Generate a 1D soliton profile.
    Args:
        m (int): Height of the pattern
        n (int): Width of the pattern
        y_val (int): Position of the soliton
        Mach (float): Mach number
        xi (float): xi parameter
        theta (int, optional): Angle of the grating in degrees. Defaults to 90.
    """
    angle = 90
    angle = np.pi * angle / 180
    y, x = mgrid(m, n)
    x = x - n / 2.0
    y = y - m / 2.0 + y_val

    Psi = (
        np.sqrt(1 - Mach**2) * np.tanh((y / (np.sqrt(2) * xi)) * np.sqrt(1 - Mach**2))
        + 1j * Mach
    )
    Amp = np.abs(Psi)
    Phase = np.angle(Psi)

    return Amp, Phase

I call the function to get the amplitude and phase and use phase_amplitude to generate the pattern before to update the SLM:

import SLM
import numpy as np

m, n = 1080, 1920
slm = SLM.SLMscreen(3)

Y, X = SLM.mgrid(m, n)
Y = Y.astype(float)
X = X.astype(float)

Mach = 0.0
xi = 1
Amp, Phase = SLM.Soliton1D(m, n, m / 2, n / 2, Mach, xi)

pat = SLM.phase_amplitude(Amp, Phase, pitch=16, theta=90)
slm.update(pat)

In the group

Brand	Model	Resolution	Pixel size (um)	Reflectivity (%)	Who is using it ?	How many ?
Hammamatsu	X15213-02????	1272×1024	12.5	97	Quentin S	2
Holoeye	PLUTO-2.1	1920x1080	8.5	95	Myrann B and Clara P	2
Hammamatsu	X15213-02????	1272×1024	12.5	97	Kevin F	2
Holoeye	PLUTO-?????	1920x1080	8.5	95	Killian G	2
Texas Instruments	DLPA?????	1920x1080	???	???	Not used	1