Yokogawa Electric Corp (Japan)
Mettler Toledo (US)
Toptica Photonics (Germany)
Hubner GmbH & Co KG (Germany)
Agilent Technologies Inc. (US)
Focused Photonics Inc. (China)
Luna (US)
NEC Corporation (Japan)
NeoPhotonics Corporation (US)
and Santec Corporation (Japan) among others