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ULN Diode Laser Modules ULN-Series diode laser modules are designed for applications that require particularly low noise or mode-hop, noise-free operation. Sophisticated drive electronics are used to ensure low noise output. Typical RMS noise is 0.06% or better for detector bandwidth from 10 Hz to 10 MHz, with practically no warm-up time. The ULN-Series features an alternative solution to the mode-hop problem. Rather than regulate temperature, a special modulation is used to force the laser into a multi-longitudinal mode. While a normal laser will operate in a single-mode longitudinal or oscillate between two strong modes, the modulation creates several modes of lower intensity. As the laser temperature increases, these modes move like a caterpillar across the wavelength spectrum. The movement does not allow abrupt changes, so the system operates as if there were no mode-hops. The result is low RMS noise (~0.06%), which is stable over changes in temperature and the life of the diode laser module. • ULN stabilizes both power and noise during temperature changes (note that wavelength varies with the standard temperature coefficient of the diode, ~0.2 nm/°C). • ULN controls noise over the lifetime of the laser and will not develop mode-hop noise as the laser ages. • ULN does not change the spatial qualities of the laser beam, so the beam can be focused to the same spot size, profile and shape. FEATURES • Ultra-low noise (ULN) • RMS noise <0.06% for bandwidths of 10 Hz to 10 MHz • Circular beam • No mode-hop noise • No warm-up period • Wavelength 635 nm with 5 mW • Long lifetime APPLICATIONS • Genomics • Particle Counting • Flow Cytometry • Confocal Microscopy • Spectroscopy Superior Reliability & Perform

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Variable Angle Diode Laser Mount 0221-449-00 Variable Angle, 1/4-20 inch Base, 19 mm Bore Variable Angle Diode Laser Mount This simple mount acts as combined heat sink, electrical insulator • Simple tip/tilt and lock in place mechanism and variable angle mount for 19.0 mm ULN lasers. The lasers are held firmly in a spherical-surface brass ring by two small set screws. This ring is clamped between two insulating blocks forming a “ball • Adjustable angle through about ±15 degrees and socket” arrangement. Two socket-head screws can be loosened to allow easy angular adjustment of the module...

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