Yeah, I figure it's mostly PON ... but don't they also sell into the metro and LH platforms? There was a mention of that back in 2008.
One interesting factor is that NeoPhotonics's gross margin keeps rising (34% in 4Q'09). Huawei using higher-margin parts than PON would help explain that. (Of course, Huawei isn't 100% of sales...)
re: NeoPhotonics Readies Its IPOThe highest single item sale to Huawei is their AWG based VMUX, the fruits of Lightwave Microsystem, which took in close to $200M of investment before became part of Neo. They also sell signficant amount of low end SONET/SDH SFP transceivers to Huawei, products came from Photon part that they acquired a few yrs back.
Is there a specific dominant component, or a pretty broad supply pipe into Huawei?