3. Premium Transmission Gratings for Telecom and Datacom优质透射光栅主要用于电信和数据通信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.
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
产品列表: Polarization-Independent Telecom Transmission Gratings |
P/N prefix | Line Density (Lines/ mm) | Line Density Uniformity (Lines/mm) | Wavelength Range (nm) | Angle of Incidence1 (°) | Diffraction Efficiency2 (%) | Insertion Loss Ripple (dB) | Spectral Uniformity2 (dB) | Polarization- Dependent Loss2 (dB) | Spatial PDL Uniformity2 (dB) | Wavefront Error (@1545 nm λ) | Substrate thickness (mm) |
T-940C | 940.07 | 0.001 | 1525-1565 | 46.5+1 | > 94 | < 0.1 | < 0.2 | < 0.2 | +0.05 | < 0.1 | 0.675+0.05 |
T-940L | 940.07 | 0.001 | 1570-1610 | 48.4+1 | > 94 | < 0.1 | < 0.2 | < 0.2 | +0.05 | < 0.1 | 0.675+0.05 |
T-940CL | 940.07 | 0.001 | 1526-1610 | 47.5+1 | > 92 | < 0.1 | < 0.2 | < 0.2 | +0.05 | < 0.1 | 0.675+0.05 |
T-966C | 966.18 | 0.001 | 1525-1565 | 48.3+1 | > 94 | < 0.1 | < 0.2 | < 0.2 | +0.05 | < 0.1 | 0.675+0.05 |
TRF-940C | 940.07 | 0.001 | 1525-1565 | 46.5+1 | > 94 | < 0.01 | < 0.2 | < 0.2 | +0.05 | < 0.2 | 5.6+0.2 |
TRF-966C | 966.18 | 0.001 | 1525-1565 | 48.3+1 | > 94 | < 0.01 | < 0.2 | < 0.2 | +0.05 | < 0.2 | 5.6+0.2 |
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. |
High Dispersion Single Polarization Telecom Transmission Gratings |
P/N prefix | Line Density (Lines/ mm) | Line Density Uniformity (Lines/mm) | Wavelength Range (nm) | Angle of Incidence1 (°) | Diffraction Efficiency2 (%) | Insertion Loss Ripple (dB) | Operational Polarization | Spatial Uniformity2 (dB) | Wavefront Error (@1545 nm λ) | Substrate thickness (mm) |
T-1200C | 1201.20 | 0.001 | 1529-1568 | 68+0.5 | > 90 | < 0.03 | S | < 0.25 | < 0.1 | 5.6+0.2 |
T-1166L | 1166.18 | +0.001 | 1572-1612 | 68+0.5 | > 90 | < 0.04 | S | < 0.25 | < 0.1 | 5.6+0.2 |
Polarization Independent Datacom Transmission Gratings |
P/N prefix | Line Density (Lines/ mm) | Line Density Uniformity (Lines/mm) | Wavelength Range (nm) | Angle of Incidence1 (°) | Diffraction Efficiency2 (%) | Operational Polarization | Polarization-Dependent Loss2 (dB) | Wavefront Error (@650 nm λ) |
T-1702-895 | 1702.13 | 0.001 | 850-940 | 49.5+1 | > 90 | S | < 0.3 | < 0.25 |
T-1200-1310 | 1201.20 | 0.001 | 1275-1345 | 52.0+1 | > 85 | S | < 0.3 | < 0.25 |
4. Ultra-High Efficiency Reflecting Grating 超GX反射光栅 LightSmyth’s ultra-high efficiency reflection gratings are designed for use in telecom polarizatire fabricated using projection lithography and reactive-ion-etch on a single-crystal-silicon substrate and metalized (gold for IR) to achieve very high efficiency for a single polarization. Each grating is a master, not a replica, resulting in low scattered light and long lasting performance. Wafer-scale cost-effective fabrication allows us to offer very competitive prices.
Advantages:Ultra-high efficiency for a single polarization
Robust dielectric materials, no polymers are used
Each grating is a master; ultra-low scatter
Highly competitive pricing; Telcordia-qualified
Applications:Optical telecommunications (laser sources, polarization diversity systems)
High power lasers
Tunable lasers
产品列表: Telecom Reflection Gratings |
P/N | Line Density (Lines/ mm) | Line Density Uniformity (Lines/mm) | Angle of Incidence (°) | Wavefront (@1545 nm λ2) | Thickness | Substrate Material |
SLG-C12 | 1200 | 0.001 | 68+1 | | 0.68+0.050 | Silicon |
STG-C12 | 1200 | | | <0.2 | 5.7+0.1 | Fused silica |
SLG-C11.7 | 1169.59 | 0.001 | 65+1 | | 0.68+0.050 | Silicon |
STG-C11.7 | 1169.59 | | | <0.2 | 5.7+0.1 | Fused silica |
Notes: | 1 P-polarization: E vector is perpendicular to the grating line |
| 2 Over 25×12 mm aperture |
| 3 Better tolerances and surface quality available for custom products |
| The following parameters apply to SLG-12 and SLG-11.7 products: – Wavelength Range (in vacuum) = 1525-1565 nm – Operational Polarization1 = P- – Diffraction Efficiency = >90% – Coating = Gold – Technology = lithographic patterning, reactive ion etch – Width and Height Tolerance3 = +0.2 mm – Grating clear aperture (CA) = Centered, 0.5 mm from substrate edges – Surface quality in CA = 60/40 scratch/dig |