Open Beam Stub Laser Diode Package

The Open Beam “Stub laser” Diode package is a Homogenized, TEC-cooled, Multi-Mode 14-Pin BF Diode, with an integrated photodiode with Volume Bragg Grating (VBG) for a spectrum-stabilized, ultra-narrow spectral bandwidth. This laser diode features high output power (> 300 mW) with low power consumption, and it has a proprietary mode-mixing waveguide for a shaped and homogenized beam profile.

The shaping and homogenization evenly spread out the power density and shapes the beam to match the field of view of a camera or spectrometer slit with minimal decrease in coherence length. Designed to meet the most demanding wavelength requirements and replace expensive DFB, DBR, fiber, and external cavity lasers, the multimode spectrum stabilized laser offers superior wavelength stability over time and temperature (0.007 nm/°C), and vibration. Multimode laser diodes are available with a narrower spectral linewidth for FWHM < 0.1 nm (0.07 nm typical) upon request. Devices can be spectrally tailored (638 – 1064 nm) to suit application needs and offer side mode suppression ratios (SMSRs) better than 40 dB (70 dB at some wavelengths – available with additional optional filter).

This “stub laser” diode package configuration has shown improved performance for many applications. For Raman spectroscopy, the small footprint, high power, narrow laser linewidth, high signal to noise ratio, and output beam homogenization make this an ideal source for robust commercial systems. For laser speckle contrast imaging, the narrow spectral linewidth, long coherence length, and output beam homogenization contributed to a 50% increase in global spectral contrast.

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