AWG is a planar integrated waveguide type wavelength division multiplexing device with multiplexing and demultiplexing functions.
The arrayed waveguide grating is composed of an array waveguide used as a diffraction grating connected with two star couplers. Its structure is shown in Figure 2. It is composed of input waveguides, output waveguides and array waveguides. waveguide) composition.
The 1st slab is the input block waveguide, and the 2nd slab is the output block waveguide. The entire function is integrated on a waveguide substrate. The block waveguide is a typical Rowland circle structure (the beam emitted from any point on the Rowland circle, after being diffracted by the concave grating, must be focused on another point on the Rowland circle).
The ports of the arrayed waveguide are distributed on the arc, input and output The waveguide ports are evenly distributed on the Rowland circle determined by the arc, and form a concave diffraction grating. The waveguide ports in each array are directly aligned with the input and output waveguide ports in the center, and the end faces are expanded to reduce the coupling loss. The number of arrayed waveguides must ensure that all incident diffracted light can be collected, that is, the numerical aperture of the arrayed waveguide is larger than the input and output waveguides Yes, so the light from the input waveguide can be transmitted to the output waveguide without distortion (or small distortion).
Adjacent arrayed waveguides have the same fixed length difference, and are generally designed to be an integer multiple of the physical length corresponding to the center wavelength.
HTF's AAWG (Athermal Array Waveguide Grating) module is based on PLC (Planar Waveguide) technology and does not require additional power supply or temperature control. It is a pure passive module; compared to traditional TFF (Thin Film Filter) products, AAWG It has the advantages of high integration, good uniformity, low PMD, and low insertion loss. Based on mature technology, HTF can provide 32-channel, 40-channel, 48-channel or even larger channel athermal AWG module, the packaging method and expansion port can be customized.
If need more information, please contact HTF team
Email: melanie@htfuture.com
