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Spatial Light Modulators (SLMs) - SLM-128 and SLM-640

Spatial Light Modulators (SLMs) - SLM-128 and SLM-640

Spatial Light Modulators (SLMs) - SLM-128 and SLM-640

Product catalog summary
Introduction
Spatial Light Modulators (SLMs) are advanced optical devices used for modulating light in terms of phase and amplitude. Developed in collaboration with MIT, these devices utilize liquid crystal technology to achieve precise light modulation.

Liquid Crystal Optical Modulation
SLMs use nematic liquid crystals to alter the phase or amplitude of light. The modulation is achieved by varying the refractive index for light polarized along the crystal's extraordinary axis, while the ordinary axis remains unchanged. Single-mask SLMs can modulate either phase or amplitude, whereas dual-mask models allow simultaneous modulation of both.

Key Features and Benefits
  • Solid-state design for rapid, vibrationless operation.
  • Available in single-mask or dual-mask configurations for phase, amplitude, or simultaneous control.
  • Operates in visible (VIS) or near-infrared (NIR) wavelength ranges.
  • Compact SLM-128 model for easier integration.
  • USB interface with a Software Developer’s Kit (SDK) for efficient operation.

Configurations and Models
SLMs are available in different configurations based on pixel count, modulation mode, and wavelength range. For example, the SLM-128-A-VN is configured for amplitude modulation in the 488 - 900 nm range, while the SLM-640-D-NM supports dual modulation in the 900 - 1620 nm range.

Specifications
  • Pixel height: 5000 μm; Pixel pitch: 100 μm; Interpixel gap: 2.0 μm.
  • Spectral range: 488 - 900 nm (VN models), 900 - 1620 nm (NM models).
  • Transmission: >88% for VN models, >92% for NM models.
  • Pulse damage threshold: 100 μJ/cm² at 490 nm, 200 μJ/cm² at 890 nm.
  • Response time: 35 ms for VN models, 70 ms for NM models.

Accessories and Additional Features
SLMs come with integral control electronics, USB interface, and software drivers. Optional accessories include a reflective surface for double-pass configuration, enhancing modulation efficiency.

Conclusion
PerkinElmer's SLMs offer advanced optical modulation capabilities with precise control over phase and amplitude, suitable for various applications in the VIS and NIR ranges.
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Catalog excerpts

Spatial Light Modulators (SLMs) - SLM-128 and SLM-640-1

Spatial Light Modulators Key Features and Benefits • Solid-state for rapid, vibrationless operation • Single-mask or dual-mask liquid-crystal designs for phase, amplitude, or simultaneous phase/amplitude control • VIS or NIR wavelength ranges • Smaller SLM-128 enclosure for easier integration • USB interface with free Software Developer’s Kit (SDK) for efficient low-power operation and software integration SLM-128 and SLM-640 Simultaneous phase and amplitude modulation of your VIS or NIR beam with no moving parts These Spatial Light Modulators (SLMs) are based on proven industry-leading designs, and offer both single-mask and dualmask configurations for phase, amplitude, or for simultaneous phase/amplitude pulse shaping. Now part of PerkinElmer, Cambridge Research & Instrumentation, Inc. (CRi) collaborated with the Massachusetts Institute of Technology (MIT) on the initial development of modern liquid crystal (LC) SLMs, and is the exclusive worldwide licensee of MIT’s technology for bonded optical masks for simultaneous phase and amplitude control in a single device. Liquid Crystal Optical Modulation Our SLM optics use nematic LC to alter the phase or the amplitude of light. The LC masks provide an electrically variable index of refraction for light that is polarized along the crystal’s “extraordinary” axis. The refractive index of light that is polarized along the “ordinary” axis (also called the orthogonal axis), is not changed. Depending on the orientation of the extraordinary axis of the LC mask and the placement of linear polarizers in front and/or behind the LC mask, a single-mask SLM can modulate a beam’s phase or amplitude. The dual-mask models use a patented arrangement where two LC masks are bonded together in precise registration and proximity. The masks are oriented orthogonal to one another and 45 degrees to the polarization of incident light. This arrangement enables the independent adjustment of both phase and amplitude. Removing the polarizers and driving both masks with the same patterns so the differential is zero allows the SLM to be used as a pure phase modulator for arbitrarily polarized light.

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Spatial Light Modulators (SLMs) - SLM-128 and SLM-640-2

electrically varied at each pixel to modulate phase 3. Exit polarizer ensures horizontal po/Brization Phase Modulation Transmissive Mode Amplitude Modulation Transmissive Mode modulates phase 4. Polarizer selects horizontal polarization component Phase & Amplitude Modulation Transmissive Mode An available and removable surface-coated mirror allows the beam to pass through the system twice. This so-called "double-pass" configuration doubles the optical modulation of the SLM and can result in faster time response when changing between different drive patterns. xxx = number of pixels per mask (128...

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Spatial Light Modulators (SLMs) - SLM-128 and SLM-640-3

Specifications LC optics masks Pixels per mask Pixel height Pixel pitch Interpixel gap1 Intermask alignment 2, 3 Intermask separation2,4 Spectral range5 Transmission (VN)13 Transmission (NM)13 Pulse damage threshold Maximum modulation6,7 Modulation temperature coefficient8 Response time9-12 Drive waveform Drive resolution Frame buffers Interfaces Power Mechanical mounting Overall size Operating temperature Storage temperature 640 5000 μm (5 mm) 100 ± 0.005 μm 2.0 μm n/a ± 2.0 μm n/a ± 2.0 μm n/a 1.03 mm n/a 1.03 mm 488 - 900 nm (VN models), 900 nm - 1620 nm (NM models) > 88% > 85% > 88% > 85%...

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Spatial Light Modulators (SLMs) - SLM-128 and SLM-640-4

For more information, please visit www.perkinelmer.com/SLM Email: [email protected] For a complete listing of our global offices, visit www.perkinelmer.com/ContactUs Copyright ©2013, PerkinElmer, Inc. All rights reserved. PerkinElmer® is a registered trademark of PerkinElmer, Inc. All other trademarks are the property of their respective owners

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