As China's first company to propose and promote the 976nm pumping scheme for industrial applications, Everbright has established this solution as the industry mainstream through years of practice. However, with fiber lasers penetrating advanced manufacturing and scientific research fields, upstream pump sources face stricter performance requirements, exposing limitations in current 976nm solutions. Centering on customer needs, Everbright developed an integrated grating chip module, creating new opportunities for industry advancement.

Advantages of 976nm Pumping Scheme

Yb-doped fiber lasers widely adopt 976nm pumping to achieve higher power and superior beam quality. Compared with traditional 915nm pumping, its core advantages include:

• 20% reduction in quantum defect, increasing system efficiency to >40%

• 3× higher absorption cross-section, enabling equivalent gain with shorter fibers to suppress nonlinear effects

• 30% lower thermal load, significantly simplifying thermal management

Challenges of 976nm Pumping

1. Narrow absorption bandwidth: Spectral width <10nm, with >0.5nm wavelength shift causing efficiency cliff-edge degradation.

2. Limitations of external-cavity VBG wavelength locking:

• Narrow locking range: Effective only under limited temperature/current conditions
• Temperature control dependency: Requires active thermal compensation for diode wavelength drift
• Residual light stripping: Unabsorbed pump light increases system complexity and cost via cladding light strippers
• High cost: VBG materials and complex optical assembly escalate module size and cost
• Locking latency: ~100ms spectral stabilization time insufficient for specialized applications

Solution: Integrated Grating Chip Module

To address these challenges, Everbright developed an Integrated Grating Laser Chip Fiber-Coupled Module:

1. 300W 135/155μm Sample Module

△ Temperature-dependent power characteristics

• Proprietary epitaxial chip design enables linear power output across wide temperature ranges

• 300W output compatible with mainstream gain fibers, requiring no system redesign

2. >55°C Broad-Temperature Wavelength Locking

△ Temperature-dependent spectral characteristics

• Achieves full-current spectral locking (FWHM <0.4nm) from 10°C to 65°C

• Eliminates external cavity optics, reducing cost and enhancing environmental adaptability

3. Low Thermal Wavelength Drift (0.07nm/°C)

△ Wavelength-temperature drift coefficient

• Ensures pump spectrum remains within gain absorption band under thermal variations

• Stabilizes laser output modes for improved beam quality

4. Ultra-Fast Locking (<10ms)

△ Time-wavelength-intensity diagram

• <10ms stabilization time enables rapid response for high-precision applications

5. Chip Reliability (Zero Failure in 2-Batch 1000hr Tests)

△ 3× accelerated lifetime testing

• Passed 1000hr accelerated aging with zero failure

• Ensures long-term operational stability in industrial environments

This breakthrough product overcomes traditional pump source limitations, propelling fiber laser technology toward higher power, superior beam quality, and enhanced reliability – meeting escalating market demands!