LightSmyth Technologies - Crafting Light for Industry and Science

Products:

Premium Transmission Gratings:

High Efficiency Polarization-Independent Transmission Gratings for Optical Telecommunications

Premium Transmision Grating

Transmission gratings operate to angularly disperse incident light into a spectrum. LightSmyth's transmission gratings utilize state-of-the-art design and precise lithographic wafer-scale fabrication to deliver record-breaking optical performance combined with low cost, providing your optical systems with a powerful competitive edge. These gratings provide the world's best combination of highest diffraction efficiency, low PDL and highly competitive pricing.

Measured Diffraction Efficiency Curves
    Advantages:
  • Exceptional diffraction efficiency
  • Ultra-low polarization-dependent loss
  • Special design for broad passband and low angular sensitivity
  • Uses only fused silica and highly robust dielectric materials
  • No polymers or organics are used; Telcordia-qualified
  • Each grating is a master; ultra-low scatter
  • Highly competitive pricing
    Applications:
  • Optical telecommunications (ROADM, WSS, WDM MUX/DEMUX)
  • Pulse compression of pico- and femto-second pulses
  • High power lasers
  • Spectral beam combining
  • Remote optical sensors and spectroscopy

Specifications below are for stock gratings that are available immediately. Transmission gratings of similar performance with other line densities, operating spectral bands, input/output beam geometries and substrate sizes can be supplied. Please check the Custom Gratings section for general capabilities and/or contact LightSmyth at 541-431-0026 or info@lightsmyth.com.

Specifications

Optical

Description T-940-C T-966-C T-940-L T-940-CL Units
Groove Density 940.07 966.2 940.07 940.07 grooves/mm
Operational Wavelength Range 1526-1566      (C band) 1526-1566     (C band) 1570-1610     (L band) 1526-1610 (C+L band) nm
Optimum Incidence Angle1 46.5 48.3 48.4 47.5 degrees
Groove Density Uniformity 0.001 0.001 0.001 0.001 grooves/mm
Diffraction Efficiency (s- and p-polarization) 2 > 94 > 94 > 94 > 92 %
Polarization Dependent Loss 2 < 0.2 < 0.2 < 0.2 < 0.25 dB
Spectral Non-Uniformity 3 < 0.15 < 0.15 < 0.15 < 0.25 dB
Spatial PDL Non-Uniformity 2 < 0.1 < 0.1 < 0.1 < 0.1 dB
Datasheet Download Download Download Download N/A
1 Optical grating performance will remain substantially similar over a 5 ° variation in angle of incidence.
2 Worst case in the operational wavelength range.
3 Efficiency variation over the operational wavelength range (per polarization).

Dimensional

Description Value
Substrate Width and Height Tolerance standard tolerance ± 0.2 mm
Grating Area Clear Aperture (CA) 0.5 mm from substrate edge
Substrate Thickness 0.675 ± 0.050 mm
Surface Quality in CA 60/40 scratch/dig
Surface Quality outside of CA no requirements
Material Fused silica substrate, non-organic dielectrics. Contains no polymers.

Pricing

Please contact LightSmyth Technologies at 541-431-0026 or info@lightsmyth.com to request a quotation or for additional technical information.

Ordering Information

Type Substrate Size 1 Clear Aperture Part Number
C band, 940 grooves/mm 24 × 9 mm 23 × 8 mm T-940C-2409-94
  24 × 14 mm 23 × 13 mm T-940C-2414-94
C band, 966 grooves/mm 16 × 10 mm 15 × 9 mm T-966C-1610-94
  27 × 10 mm 26 × 9 mm T-966-C-2710-94
  24 × 16.4 mm 23 × 15.4 mm T-966C-24x16.4-94
L band, 940 grooves/mm 27.4 × 10 mm 26.4 × 9 mm T-940L-2710-94
C+L band, 940 grooves/mm 27.4 × 10 mm 26.4 × 9 mm T-940CL-2710-92
1 Grating grooves are perpendicular to the first substrate dimension.

Custom High-Efficiency Transmission Gratings

LighSmyth also offers custom highly-efficient transmission gratings fabricated to your specifications, including custom wavelength range, line count, size and performance levels.

Our optical engineers are standing by to assist with your custom application. Please contact us at 541-431-0026 or info@lightsmyth.com.