Advantages
- High Output Power (2.5 W)
- Thermal Stability up to 40°C
- Compact & Cost-Efficient Design
- Ensures clean, stable laser output by minimizing unwanted spectral noise
- Delivers exceptional spectral purity for high-resolution Raman and gas spectroscopy
Summary
High-power laser sources are essential for use in applications such as Raman spectroscopy and trace-gas sensing, where high output power, spectral purity, and environmental stability are required. Conventional high-power diode sources, though, are plagued by broad spectral line width and thermal drift, and narrow-line laser sources are often of low power, costly, and dependent upon sophisticated active cooling systems. This compromise among power, purity, and practicability has prevented the use of compact and inexpensive spectroscopic systems in rugged, real-world environments.
To address this, researchers at the University of South Florida have introduced an ultra-compact, passively cooled external cavity diode laser that combines Littrow grating feedback with precise cylindrical beam correction. This technology achieves an ultra-narrow spectral linewidth of 40 picometers with an output power of 2.5 watts—both high power and spectral stability in an affordable form factor. The performance was confirmed in testing with consistent output at 443 nm with ~40 dB side-mode suppression and stable operation over the temperature range up to 40°C with passive cooling. This laser presents an economical, scalable alternative to traditional systems, optimized for field-ready, next-generation sensing applications.
Schematic of multimode external cavity diode laser and photograph of assembly.
Desired Partnerships
- License
- Sponsored Research
- Co-Development