Product: Transmission Gratings for Optical Communications

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

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
  • Extremely precise line density (line density uniformity <0.001 lines/mm)
  • 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.

Polarization-Independent Telecom Transmission Gratings
S/N prefix Wavelength Range (nm) Line Density (Lines/ mm) Angle of Incidence1 (°) Diffraction Efficiency2 (%) Insertion Loss Ripple (dB) Polarization- Dependent Loss2 (dB) Wavefront Error (@1545 nm λ) Substrate thickness (mm) Spectral Plot
T-966C 1525-1565 966.18 48.3+1 > 94  < 0.1  < 0.2  < 0.1  0.675+0.05 Spectral Plot
T-940C 1525-1565 940.07 46.5+1 > 94  < 0.1  < 0.2  < 0.1  0.675+0.05 Spectral Plot
T-940L 1570-1610 940.07 48.4+1 > 94  < 0.1 < 0.2  < 0.1  0.675+0.05 Spectral Plot
T-940CL 1526-1610 940.07 47.5+1 > 92  < 0.1  < 0.2  < 0.1  0.675+0.05 Spectral Plot

 

High Dispersion Single Polarization Telecom Transmission Gratings
P/N prefix Wavelength Range (nm) Line Density (Lines/ mm) Angle of Incidence1 (°) Diffraction Efficiency2 (%) Insertion Loss Ripple (dB) Operational Polarization Wavefront Error (@1545 nm λ) Substrate thickness (mm) Spectral Plot
T-1200C 1529-1568 1201.20 68+0.5 > 90  < 0.03  S  < 0.1  5.6+0.2 Spectral Plot
T-1166L 1572-1612 1166.18 68+0.5 > 90  < 0.04  S  < 0.1  5.6+0.2 Spectral Plot

 

Polarization Independent Datacom Transmission Gratings
P/N prefix Wavelength Range (nm) Line Density (Lines/ mm) Angle of Incidence1 (°) Diffraction Efficiency2 (%) Polarization-Dependent Loss (dB) Wavefront Error (@650 nm λ) Spectral Plot
T-1702-895 850-940 1702.13 49.5±1 ≥ 90  < 0.3  < 0.25 Spectral Plot
T-1200-1310 1275-1345 1201.20 52.0±1 ≥ 85 < 0.3  < 0.25 Spectral Plot
Notes: 1 Gratings will be highly efficient over larger range of angles – please inquire.
  2 Determined from parabolic fit of efficiency as a function of wavelength for s- and p- polarization, worst case in the wavelength range.

 

Part Number Line Density
(Lines/mm)
Wavelength Min Efficiency Substrate Size1 Price
T-966C-1610-94 966.18 1525-1565 94 16 × 10 mm $295.00 Buy Now
T-966C-1610-90 90 16 × 10 mm $245.00 Buy Now
T-966C-2710-94 94 27 × 10 mm $445.00 Buy Now
T-966C-2710-92 92 27 × 10 mm $395.00 Buy Now
T-966C-24×16.4-92 92 24 × 16.4 mm $395.00 Buy Now
T-940C-16×8.5-94 940.07 1525-1565 94 16 × 8.5 mm $195.00 Buy Now
T-940C-21×17-94 94 21 × 17 mm $395.00 Buy Now
T-940C-2409-94 94 24 × 9 mm $265.00 Buy Now
T-940C-24×12-94 94 24 × 12 mm $285.00 Buy Now
T-940C-24×20.5-90 90 24 × 20.5 mm $315.00 Buy Now
T-940C-24×14-94 94 24 × 14 mm $395.00 Buy Now
T-940C-29×9.5-92 92 29 × 9.5 mm $195.00 Buy Now
T-940C-2409-94p 940.07 1525-1565 94 for P pol only 24 × 9 mm $185.00 Buy Now
T-940C-24×12.5-94p 94 for P pol only 24 × 12.5 mm $195.00 Buy Now
T-940L-2710-92 940.07 1570-1610 92 27.45 × 10 mm $395.00 Buy Now
T-940CL-2710-92 940.07 1526-1610 92 27.45 × 10 mm $475.00 Buy Now
T-940CL-2115-92 940.07 1526-1610 92 for P pol only 21 x 15 mm $395.00 Buy Now
Notes: 1 Grating lines are parallel to the second dimension.


Custom High-Efficiency Transmission Gratings

LightSmyth offers highly-efficient, ultra-low polarization-dependent-loss transmission gratings with custom line densities, sizes and angles of incidence. Our optical engineers will gladly assist with your custom application.