Stanford Research Systems voltage-controlled current source has standard optical fiber communication interfaces
The CS580 voltage-controlled current source generates a precision current output directly from an AC and/or DC control voltage. Suited for use with AC instruments such as lock-in amplifiers, it has variable gain from 1 nA/V to 50 mA/V, up to 200 kHz of bandwidth, and standard optical fiber communication interfaces.
Stanford Research Systems
Sunnyvale, CA
www.thinksrs.com