After spending two days at the Optical Networking and Communication Conference & Exhibition, B. Riley FBR analyst Dave Kang is "incrementally cautious" on the optical component industry. One clear conclusion from the event is that the datacom end market is as bad as feared, which is a negative for Applied Optoelectronics (AAOI) and to a lesser degree Finisar (FNSR). Further, the analyst says he continues to pick up mixed data on the Chinese market. Aside from Lumentum (LITE), most U.S.-based component vendors remain cautious and/or uncertain about growth prospects in China this year, Kang contends.