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Spatial Light Modulators


  • Reflective 2D Phase Only Spatial Light Modulators (SLMs)
  • 400 - 850 nm, 650 - 1100 nm, or 1550 nm Operating Wavelengths
  • Available Resolutions: 1920 x 1080, 1920 x 1200, or 3840 x 2160
  • Highly Stable Phase Control with Minimal Flickering

EXULUS-HD4

1920 x 1200 (WUXGA),
1550 nm

Image Generated by SLM Using Computer-Generated Hologram Projection. For Details, See the App Note Tab

EXULUS-4K1

3840 x 2160 (4K UHD),
400 - 850 nm

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Key Specificationsa
Item #
Suffix
Operating
Wavelength
Panel
Resolution
Fill
Factor
Phase / Retardance
Rangeb
Frame
Rate
Output
Trigger
HD1 400 - 850 nm 1920 x 1080
(Full HD)
>93% 2π at 633 nm (Standard)
4.7π at 532 nm (Extended)
60 Hz or
180 Hzc
N/A
HD2 400 - 850 nm 1920 x 1200
(WUXGA)
>92% π or 2π at 633 nmd 60 Hz Yes
(SMA)
HD3 650 - 1100 nm 1920 x 1200
(WUXGA)
>92% π or 2π at 1064 nmd 60 Hz
HD4 1550 nm 1920 x 1200
(WUXGA)
>92% π or 2π at 1550 nmd 60 Hz
4K1 400 - 850 nm 3840 x 2160
(4K UHD)
>90% 2π at 633 nm 30 Hz
  • Complete specifications may be found on the Specs tab.
  • Angles of incidence other than 0° will result in phase shifts that differ from the programmed pattern. Angles of up to 10° are possible without significantly affecting performance.
  • Frame Boost Mode (referred to as Triple Mode in the software) plays the R, G, and B channels of the HDMI signal in succession, for an overall frame rate of 180 Hz.
  • These retardance ranges are achieveable by setting the phase stroke mode to half wave or full wave in the software.
Spatial Light Modulator
Click to Enlarge

Each Exulus SLM features multiple 8-32 (M4) taps for post mounting. For a list of items used in this setup, see the App Note tab.
Spatial Light Modulator
Click to Enlarge

The Exulus SLMs are provided with a magnetic cover; when the SLM is in use, the cover can be attached to the designated area on the housing (sides for the HD1 and 4K1 models and back for the HD2, HD3, and HD4 models).

Features

  • Liquid Crystal on Silicon (LCoS) with Reflective Coating
  • Panel Resolutions: 1920 x 1080, 1920 x 1200, or 3840 x 2160
  • Operating Wavelengths: 400 - 850 nm, 650 - 1100 nm, or 1550 nm
  • Fill Factor: >90% (Varies by Model)
  • Independent Horizontal and Vertical SLM Panel Tilt Adjustments
  • Trigger Output for Timing Control of Other Devices (All Models Except EXULUS-HD1)
  • Fast Frame/Refresh Rates up to 180 Hz (EXULUS-HD1 Only, Using Frame Boost)
  • Customizations Available:
    • Panel and Controller in Separate Units
    • Other Retardance Ranges (Contact Tech Support for Details)

Applications

  • Wavefront Correction
  • Optical Trapping
  • Beam Steering
  • Pulse Shaping
  • Adaptive Optics
  • Holography

Thorlabs' Exulus® Spatial Light Modulators (SLMs) employ Liquid Crystal on Silicon (LCoS) technology to produce high-resolution, high-speed reflective phase modulation with individually addressable pixels. This phase control is highly stable with minimal fluctuations and minimal crosstalk with adjacent pixels. For maximum phase shift values, refer to the table to the upper right. These spatial light modulators provide far more pixels than lower-order phase modulators such as segmented or deformable mirrors.

Each spatial light modulator includes a built-in SLM panel with independent horizontal and vertical tilt adjustment of ±3.2°. Locking rings are installed to fix the adjustment settings, as well as provide extra stability. Customized versions are also available with the panel separated from the control unit; contact Tech Support for details.

Exulus spatial light modulators are driven by an HDMI signal and operate as a general Full HD, WUXGA, or 4K screen. They are bundled with a software GUI that provides complete control over the device. Different driving modes are supported by the software, including full frame, image input, video input, Fresnel lens, diffraction, and computer-generated holography (CGH). The CGH mode also allows tilting and focusing effects to be overlaid onto a pattern. The GUI enables quick switching between operating modes, as well as allowing images, videos, and patterns to be uploaded to the panel. For more details on the operating modes, please see the Software and App Note tabs.

All Exulus spatial light modulators are shipped in a carrying case along with HDMI-to-HDMI and HDMI-to-DisplayPort cables as well as a mini-USB cable for connecting to a PC. Also included are a power supply with a location-specific power cord and a HKTS-5/64 hex key thumbscrew for adjusting the horizontal and vertical tilt adjusters.

Item # EXULUS-HD1(/M)
Panel Resolution 1920 x 1080 (Full HD)
Type Liquid Crystal on Silicon (LCoS) with Reflective Coating
Operating Wavelength 400 - 850 nm
Panel Active Area 12.5 mm x 7.1 mm
Pixel Pitch 6.4 µm
Fill Factor >93%
Reflective Coating Aluminum
Average Reflectance 75% (Typical)
Phase / Retardance Range 2π at 633 nm (Standard Mode); 4.7π at 532 nm (Extended Mode)
Angle of Incidencea
Optic Axis 45°
Reflected Wavefront Distortion <λ/7 @ 633 nm
Damage Threshold CWb 5 W/cm (532 nm, Ø0.0107 mm)
Pulsed (ns) 0.63 J/cm(532 nm, 8.6 ns, 10 Hz, Ø203 µm)
Pulsed (fs) 0.138 J/cm(535 nm, 59.4 fs, 100 Hz, Ø188 µm)
Frame Rate 60 Hz (Standard Mode); 180 Hz (Frame Boost/Triplec)
Fluctuation / Flickering (RMS)d <1% (Standard Mode); <5% (Extended Mode)
Beam Deviation Using Panel Tip / Tilt ±3.2°
Trigger Outpute None
Trigger Output High Voltage Level N/A
Trigger Output Pulse Width N/A
Dimensions (L x W x H)f 172.0 mm x 110.0 mm x 81.6 mm (6.77" x 4.33" x 3.21")
Weight 1.24 kg (2.73 lbs)
Storage Temperature 0 °C to 60 °C (32 °F to 140 °F)
Operating Temperatureg 10 °C to 40 °C (50 °F to 104 °F)
PC Connection HDMI and USB 2.0
Bit Depth 8 Bit, 0 - 255 Gray Level
  • Other angles of incidence will result in phase shifts that differ from the programmed pattern. Angles of up to 10° are possible without significantly affecting performance.
  • The power density of your beam should be calculated in terms of W/cm. For an explanation of why the linear power density provides the best metric for long pulse and CW sources, please see the Damage Thresholds tab.
  • Frame Boost Mode (referred to as Triple Mode in the software) plays the R,G, and B channels of the HDMI signal in succession, for an overall frame rate of 180 Hz.
  • Fluctuation / Flickering is the phase fluctuation as the percentage of the entire phase range and is dependent on current phase setting. The value stated is the maximum fluctuation and typically occurs at half of the phase range.
  • For more details on the external trigger output, please refer to the product manuals accessible through the red Docs () icons below.
  • The reported height dimension includes the maximum travel range of the adjuster knob.
  • Ambient temperature fluctuations may cause the characteristics of your SLM to change. Using it at an ambient temperature of 25 °C is recommended.

Item # EXULUS-HD2 EXULUS-HD3 EXULUS-HD4
Panel Resolution 1920 x 1200 (WUXGA)
Type Liquid Crystal on Silicon (LCoS) with Reflective Coating
Operating Wavelength 400 - 850 nm 650 - 1100 nm 1550 nm
Panel Active Area 15.42 mm x 9.66 mm
Pixel Pitch 8 µm
Fill Factor >92%
Reflective Coating Aluminum Dielectric
Average Reflectance 80% (Typical) 82% (Typical)
Phase / Retardance Range 2π at 633 nm (Full Wave Mode)
π at 633 nm (Half Wave Mode)
2π at 1064 nm (Full Wave Mode)
π at 1064 nm (Half Wave Mode)
2π at 1550 nm (Full Wave Mode)
π at 1550 nm (Half Wave Mode)
Angle of Incidencea
Optic Axis
Reflected Wavefront Distortion <λ/2 @ 633 nm <0.4λ @ 633 nm
Damage Threshold Pulsed (ns) 0.22 J/cm
(532 nm, 6.8 ns, 10 Hz, Ø200.5 µm)
0.15 J/cm2
(1064 nm, 10 ns, 100 Hz, Ø235 µm)
0.187 J/cm
(1550 nm, 6.0 ns, 10 Hz, Ø230.6 µm)
Pulsed (fs) 0.0935 J/cm
(515 nm, 203.3 fs, 100 Hz, Ø108.2 µm)
0.03 J/cm2
(1030 nm, 200 fs, 100 Hz, Ø135 µm)
0.076 J/cm
(1550 nm, 55.6 fs, 100 Hz, Ø143.1 µm)
Frame Rate 60 Hz
Fluctuation / Flickering (RMS)b <0.01% <0.05% <0.15%
Beam Deviation Using Panel Tip / Tilt ±3.2°
Trigger Outputc SMA Female
Trigger Output High Voltage Level 5 V (TTL)
Trigger Output Pulse Width 54 µs
Dimensions (L x W x H)d 155.9 mm x 104.3 mm x 42.0 mm (6.14" x 4.11" x 1.65")
Weight 0.76 kg (1.68 lbs)
Storage Temperature 0 °C to 60 °C (32 °F to 140 °F)
Operating Temperaturee 10 °C to 40 °C (50 °F to 104 °F)
PC Connection HDMI and USB 2.0
Bit Depth 8 Bit, 0 - 255 Gray Level
  • Other angles of incidence will result in phase shifts that differ from the programmed pattern. Angles of up to 10° are possible without significantly affecting performance.
  • Fluctuation / Flickering is the phase fluctuation as the percentage of the entire phase range and is dependent on current phase setting. The value stated is the maximum fluctuation and typically occurs at half of the phase range.
  • For more details on the external trigger output, please refer to the product manuals accessible through the red Docs () icons below.
  • The reported length dimension includes the maximum travel range of the adjuster knob. The specified height does not include the dust cover; when included, this dimension is nominally 46 mm.
  • Ambient temperature fluctuations may cause the characteristics of your SLM to change. Using it at an ambient temperature of 25 °C is recommended.

Item # EXULUS-4K1(/M)
Panel Resolution 3840 x 2160 (4K UHD)
Type Liquid Crystal on Silicon (LCoS) with Reflective Coating
Operating Wavelength 400 - 850 nm
Panel Active Area 15.6 mm x 9.2 mm
Pixel Pitch 3.74 µm
Fill Factor >90%
Reflective Coating Aluminum
Average Reflectance 64% (Typical)
Phase / Retardance Range 2π at 633 nm
Angle of Incidencea
Optic Axis 45°
Reflected Wavefront Distortion <λ/2 @ 633 nm
Damage Threshold CWb 5 W/cm (532 nm, Ø0.0107 mm)
Pulsed (ns) 0.63 J/cm(532 nm, 8.6 ns, 10 Hz, Ø203 µm)
Pulsed (fs) 0.138 J/cm(535 nm, 59.4 fs, 100 Hz, Ø188 µm)
Frame Rate 30 Hz
Fluctuation / Flickering (RMS)c <5%
Beam Deviation Using Panel Tip / Tilt ±3.2°
Trigger Outputd SMA Female
Trigger Output High Voltage Level 3.3 V (TTL)
Trigger Output Pulse Width 77 µs
Dimensions (L x W x H)e 172.0 mm x 110.0 mm x 81.6 mm (6.77" x 4.33" x 3.21")
Weight 1.24 kg (2.73 lbs)
Storage Temperature 0 °C to 60 °C (32 °F to 140 °F)
Operating Temperaturef 10 °C to 40 °C (50 °F to 104 °F)
PC Connection HDMI and USB 2.0
Bit Depth 8 Bit, 0 - 255 Gray Level
  • Other angles of incidence will result in phase shifts that differ from the programmed pattern. Angles of up to 10° are possible without significantly affecting performance.
  • The power density of your beam should be calculated in terms of W/cm. For an explanation of why the linear power density provides the best metric for long pulse and CW sources, please see the Damage Thresholds tab.
  • Fluctuation / Flickering is the phase fluctuation as the percentage of the entire phase range and is dependent on current phase setting. The value stated is the maximum fluctuation and typically occurs at half of the phase range.
  • For more details on the external trigger output, please refer to the product manuals accessible through the red Docs () icons below.
  • The reported height dimension includes the maximum travel range of the adjuster knob.
  • Ambient temperature fluctuations may cause the characteristics of your SLM to change. Using it at an ambient temperature of 25 °C is recommended.

Diffraction Efficiency

When a repeating, linear phase pattern is displayed on the SLM, it will function similarly to a blazed diffraction grating. The diffraction efficiency is the power in the first-order of the diffraction pattern divided by the zero-order when the phase of the SLM is set to zero across the panel. These measurements were made at 633 nm, 1064 nm, or 1550 nm for several test patterns with varying phase steps, effectively creating gratings with varying line spacing (denoted as line pair / mm). The measured results and patterns used are plotted below.

Phase Patterns Used to Measure Diffraction Efficiency

Phase Steps for Diffraction Efficiency

Software

"Spatial Light Modulator" Software Version 1.0.12
This software package is designed for use with our EXULUS-HD1 and EXULUS-4K1 SLMs.

"Thorlabs EXULUS" Software Version 2.3.0
This software package is designed for use with our EXULUS-HD2, EXULUS-HD3, and EXULUS-HD4 SLMs.

Click the button below to visit the software page.

Software Download

Each Exulus® SLM comes with a software interface that provides complete control of the SLM panel as well as device settings. Users can input a specific phase level (gray level) over the entire panel, import a custom image, produce a computer generated holography (CGH) pattern, and other patterns such as Fresnel lenses and diffraction gratings. All the patterns can be saved into a sequence list and played with a predefined interval of 16.7 ms (60 Hz frame rate, EXULUS-HD1, EXULUS-HD2, EXULUS-HD3 and EXULUS-HD4) or 33.3 ms (30 Hz, EXULUS-4K1) in standard mode. The EXULUS-HD1 also features a triple mode; if RGB images are used then the RGB channels will be played in succession for an overall frame rate of 180 Hz. The software also supports video input at 1080p or 4K resolution with the H.264 video codec (supported file formats: MP4, M4V, and MOV).

Note: There are two separate software packages for our Exulus spatial light modulators:

  • The "Spatial Light Modulator" software package is designed for use with our EXULUS-HD1 and EXULUS-4K1 SLMs.
  • The "Thorlabs EXULUS" software package is designed for use with our EXULUS-HD2, EXULUS-HD3, and EXULUS-HD4 SLMs.

Click the yellow bars below for screenshots highlighting various software features and capabilities: