Hangzhou Brandnew Technology Co., Ltd. is one of China's leading manufacturers and premier suppliers of advanced 4w 785nm fiber coupled diode laser. Operating a state-of-the-art factory, we specialize in the entire production spectrum—from high-performance chips, TO/F/C Mounts, COS, and MCC bars, to robust stacks and advanced fiber-coupled solutions.
4W 785nm Fiber Coupled Diode Laser
Overview
Key features:
785nm, 4W output
Hermetically sealed package
Fiber pigtail with SMA connector
Mounting to heatsink with screws
Internal peltier cooler (TEC)
Internal thermistor and photodiode
Header material – Copper
Applications:
These lasers are commonly used for communications research as well as scientific applications involving spectral analysis, biology research, and a broad spectrum of other applications.

785nm Raman spectroscopy refers to Raman spectroscopy analysis within the spectral range of 785 nanometers. Raman spectroscopy is a technique used to study molecular vibrations and rotations, and obtains information by measuring the frequency shift of scattered light from a sample.
Spec sheet:
Item No.: FC785DL4
| Optical | |
| Center Wavelength λ | 785nm |
| Wavelength Tolerance | ±5nm |
| Output Power | 4W |
| Spectral Width FWHM | 6nm |
| Electrical | |
| Operating Current Iop | 2A |
| Threshold Current Ith | 0.4A |
| Operating Voltage Vop | 8V |
| Fiber | |
| Fiber Core Diameter | 105um |
| Fiber Numerical Aperture | 0.22NA |
| Fiber Length | 1M |
| Fiber Connector | SMA905 |
| Thermal | |
| Operating Temperature | 10~30℃ |
| Storage Temperature | -20-70℃ |
| Wavelength Temperature Coefficient | ~0.3nm/℃ |
Detailed dimension

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