I wouldn’t worry too much about the standards. There are lots of optics that don’t stick to the standards, but go above and beyond.
I’m more interested in the use case at hand and if the specs will support the use case.
I once heard that Huawei was trying to do singlemode with VCSEL laser, but the descriptions clearly identify those as using 1310nm DFB http://www.6comgiga.com/downloadRepository/826d97f5-c91a-454... . It is not a 2km multimode
I wouldn’t worry too much about the standards. There are lots of optics that don’t stick to the standards, but go above and beyond.
I’m more interested in the use case at hand and if the specs will support the use case.