Diode Laser Controller Circuit produces low noise.August 9, 2004 - Working with lasers over wide resistance range, Diode Laser Current Driver Circuit is based on switching power supply that drives output current regulator. Key design features include voltage regulator to power current regulator, circuitry to equalize voltage drop across circuit elements, and placement of each on separate heatsinks. By placing 2 heatsinks face-to-face, they can be cooled by single fan for physically compact configuration.
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Original Press release
Newport Corp.
1791 Deere Ave.
Irvine, CA, 92606
USA
Newport Develops Novel, Low Noise, Diode Laser Controller Circuit
Irvine, California – August 5, 2004 – Newport Corporation has developed a novel diode laser current driver circuit with noise characteristics that are ten times lower than anything currently available on the market. In addition, this new design approach delivers greater stability, expanded dynamic range, improved electrical efficiency, and the ability to work with lasers over a wider resistance range. These improvements will benefit any noise sensitive diode laser based application, such as telecommunications research or spectroscopy.
The Newport design is based on a switching power supply that drives an output current regulator. The key innovations in the Newport design are the addition of a voltage regulator to power the current regulator, circuitry to equalize the voltage drop across these circuit elements, and the placement of each on separate heatsinks. Splitting the power dissipation through the use of two heatsinks results in the benefits already enumerated. In particular, it reduces the required thermal mass at each heatsink, enabling them to respond faster to changes in diode laser resistance or from user adjustments. By placing the two heatsinks face-to-face they can even be cooled by a single fan in a physically compact configuration. Newport has applied for a patent on this design and various alternate embodiments.
More information on Newport's comprehensive line of diode laser instrumentation is available on the company’s web site at www.newport.com/.
About Newport Corporation
Newport Corporation is a leading global supplier of advanced-technology products and systems to the semiconductor, communications, electronics, research and life and health sciences markets. The company provides components and integrated subsystems to manufacturers of semiconductor processing equipment, advanced automated assembly and test systems to manufacturers of communications and electronics devices, and a broad array of high-precision components and instruments to commercial, academic and government customers worldwide. Newport's innovative solutions leverage its expertise in lasers, precision robotics and automation, sub-micron positioning systems, vibration isolation and optical subsystems to enhance the capabilities and productivity of its customers' manufacturing, engineering and research applications. Newport is part of the Standard & Poor's Midcap 400 Index and the Russell 2000 Index.
Company Contact:
Worldwide Headquarters
David Rossi
Director of Marketing
Tel: 949.863.3144
Fax: 949.253.1800
E-mail: drossi@newport.com
Hector Lara
Senior Product Manager
Tel: 949.437.9874
Fax: 949.253.1983
E-mail: hlara@newport.com
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