Here are some of the more speculative fiber plays.

Avanex Corp. (AVNX)
Bookham Inc. (BKHM)
CIENA Corp. (CIEN)
Finisar Corp. (FNSR)
JDSU (JDSU)
MRV Communications Inc. (MRVC)
Optical Cable Corp. (OCCF)
Oplink Communications Inc. (OPLK)
Stratos International Inc. (STLW)
Sycamore Networks Inc. (SCMR)