Newport develops low-noise, diode laser controller circuit
Irvine, CA—Newport Corp. has developed a diode laser current driver circuit with noise characteristics that it says are 10 times lower than any other available solution.
Irvine, CA— Newport Corp. has developed a diode laser current driver circuit with noise characteristics that it says are 10 times lower than any other available solution. 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 laserbased application, such as telecommunications research or spectros-copy.
Newport adds its design is based on a switching power supply that drives an output current regulator. The key innovations in Newport's design are its 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 by using two heatsinks produces the results already described. 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 one fan in a physically compact configuration. Newport has applied for a patent on this design and various alternate embodiments.
Control Engineering Daily News Desk
Jim Montague, news editor
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Before the calendar turned, 2016 already had the makings of a pivotal year for manufacturing, and for the world.
There were the big events for the year, including the United States as Partner Country at Hannover Messe in April and the 2016 International Manufacturing Technology Show in Chicago in September. There's also the matter of the U.S. presidential elections in November, which promise to shape policy in manufacturing for years to come.
But the year started with global economic turmoil, as a slowdown in Chinese manufacturing triggered a worldwide stock hiccup that sent values plummeting. The continued plunge in world oil prices has resulted in a slowdown in exploration and, by extension, the manufacture of exploration equipment.
Read more: 2015 Salary Survey