Laser firm Necsel IP Inc., which supplies laser technology for cinema projection, specialty lighting, industrial and life sciences markets, has acquired PD-LD Inc., a photonic packaging company headquartered in Pennington, N.J. Financial terms of the deal were not disclosed. PD-LD manufactures and assembles custom Volume Bragg Grating (VBG) elements, VBG stabilized lasers and subsystems for a variety of applications, including Raman spectroscopy, flow cytometry, medical instrumentation, high power lasers and displays. PD-LD licenses the VBG technology to other companies active in the field. PD-LD contacts for quoting, billing and general information remain in Pennington. Necsel IP is a division of Ushio Corp.