I want to use it to have a negative voltage for the EAM bias voltage.
No, you can't hook it up backwards, but you can level shift down.
Connect the V+ pin to ground and the V- pin to -3.3V.
What's an EAM??
EAM – Electro-Absorption Modulator built in a EML laser.
756 San Aleso Ave. Sunnyvale, CA 94085
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