Abstract
We propose an ultra-broadband full-mesh wavelength router supporting the T- and O-bands using 3 stages of cascaded arrayed waveguide gratings (AWGs). The router architecture is based on a combination of waveband and channel routing by coarse and fine AWGs, respectively. We fabricated several T-band-specific silica-based AWGs and quantum dot semiconductor optical ampliers as part of the router, and demonstrated 10 Gbps data transmission for several wavelengths throughout a range of 7.4 THz. The power penalties were below 1 dB. Wavelength routing was also demonstrated, where tuning time within a 9.4-nm-wide waveband was below 400 ms.
Highlights
Development on optical communications have focused on the C- and L-bands due to the low optical power attenuation and the availability of high performance optical fiber amplifiers in these bands
We propose an ultra-broadband full-mesh wavelength router supporting the T- and O-bands using 3 stages of cascaded arrayed waveguide gratings (AWGs)
The router architecture is based on a combination of waveband and channel routing by coarse and fine AWGs, respectively
Summary
Development on optical communications have focused on the C- and L-bands due to the low optical power attenuation and the availability of high performance optical fiber amplifiers in these bands. The coarse AWGs on the third stage will multiplex M wavebands, received from M number of fine AWGs of the second stage, onto a single output port, where there are K channels per waveband. Second, and third stage to achieve full-mesh interconnection are MK, M2, and MK, respectively, making a total of 2MK + M2 number of AWGs required for the wavelength router.
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