The CW-WDM MSA multi-source agreement released its V1.0 version in September of last year and made a report at last year's ECOC. This year, they also made a report updating some of the parameters from last year's TBD and promoted the industry chain. AyarLabs, Intel, Macom, Sivers, and other factories have demos. AyarLabs and Intel have written technical principles, parameters, structures, and reliability risks.
Sivers' CW light source is based on InP production and they have cooperated with IMEC. In the CW-WDM protocol, the wavelength is concentrated in the O-band, which has the advantages of low cost and low dispersion in short-distance applications.
The wavelengths include conventional CWDM4 wavelengths, and 4-wavelength and 8-wavelength LWDM.
There are also more wavelength applications from 100GHz spacing to 800GHz spacing for DWDM using PDFA amplifiers. PDFA and EDFA are gain fibers made of praseodymium and erbium, respectively, which are lanthanides in rare earth materials. These gain fibers can be used as fiber lasers or gain fiber amplifiers. EDFA erbium-doped fiber amplifiers are widely used in the C-band. PDFA praseodymium-doped fiber amplifier is suitable for O-band amplification. The CW-WDM protocol is divided into three wavelength schemes of 1+8, 1+16, and 1+32 wavelengths within 36nm spectral width.
The 18nm spectral range has a wavelength interval that is twice as narrow as that of 36nm.
The 9nm spectral range cancels the category of 1+32 wavelengths to avoid too close wavelength intervals that are not suitable for industrialization.
The power upper limit has different requirements according to different spectral spans, mainly to reduce the fiber input power for the wide 36nm span. In addition to the several laser principles, Intel launched an 8-wavelength laser. This year, they launched a 16-wavelength laser, superior to the 8-wavelength laser.
The blue one is the laser, with 16 wavelengths. There is a small chip (guessing) under the laser, which is the current drive chip for the laser. The ribbon fiber is divided into 16 channels, with each channel having 16 wavelengths. The MPO standard optical interface is used to lead out, and this can be used in conjunction with CPO
The laser component can support 256 modulators and the silicon-based spoke wheel microring modulator used by AyarLabs can achieve a higher density layout per unit size than the MZ modulator, which is suitable for the small size of CPO in the future. The ribbon fiber is divided into 16 channels, each channel having 16 wavelengths and using the MPO standard optical interface to lead out.
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