Holographic devices

Fig. 6. "4f "dynamic holographic device with a transmissive SLM and fixed grating. 

When the other holographic device parameters are fixed, A only depends on n, as can be shown from (5). According to fixed or variable values for n or/and x, different applications for our device can be considered giving an idea of the device s versatility (see Table 2). 

There are three different sources of loss in this holographic device ... 

The working principle of the dynamic holographic device is based on the wavelength dispersion produced in a diffraction component (grating, spatial light modulator) as explained in Section 3. 

In total, with an optimized holographic device, a loss about 6 dB has to be taken into account. 

Power equalization at the all output channels is necessary to compensate the different response of the network components and distances for the used channel wavelengths. To reach it and to compensate for the holographic device losses, a gain component, such as a... 

The use of tunable holographic devices in Access and Metro networks, like demultiplexers or routers has been studied in different papers (Koonen, 2006), (Martin Minguez Horche, 2010). In Fig. 17 an application for the equalized holographic ROADM is represented. 

Fig. 19. Wavelength Conversion and Routing Holographic Device (WCR-HD) simulation...

Holographic devices offer appUcations in optical computing pattern recognition and very high density memory. 

BR-based memory devices are primarily based on M-state or O-state photochemistry. Holographic devices are based on the blue-shifted M state, although a Q-state-based holography will be discussed. In three-dimensional memories, the write process is particularly dependent on O-state photochemistry. 

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