femtosecond OPO

12-hour stability

Achieves ultra-long-term stabilization at both peak and user-defined operating points without conventional modulation, enabling practical deployment in imaging and spectroscopy.

Wenbin, Chen · Liuqi, Wang · Xiaoxiao, Hu · Yungang, Li · Fan, Jintao · Wei, Feng · Liu, Bowen · Meng, Fanchao · Hu, Minglie

Optics and Laser Technology 2026

Specifications

RMS power fluctuation

{'zh': '0.31', 'en': '0.31'} %

RMS power fluctuation

{'zh': '0.99', 'en': '0.99'} %

RMS power fluctuation

{'zh': '0.29', 'en': '0.29'} %

Maximum output power

{'zh': '3.18', 'en': '3.18'} W

Tuning range

{'zh': '660–1040', 'en': '660–1040'} nm

Advantages

No modulation needed

The model-free SPGD algorithm stabilizes the OPO without intentional modulation of the pump or complex adjustment of optical elements.

Any operating point stabilizable

Stabilization is achieved both at the oscillation peak and at user-defined off-peak target-power operating points, overcoming the limitation of conventional methods.

Excellent long-term stability

RMS power fluctuations over 12 h of 0.31%, 0.99%, 0.29% at 770, 800, 830 nm respectively, suitable for long-duration imaging and spectroscopy experiments.

Wide tuning range

The signal is tunable from 660 to 1040 nm, covering excitation wavelengths of many fluorophores and materials.

Applications

• nonlinear microscopy：Provides a stable, tunable femtosecond source, avoiding power drift during long-term imaging.
• ultrafast spectroscopy：Wide tuning range covers various excitation wavelengths, and long-term stability improves spectral consistency.
• nanophotonics：Tunable femtosecond pulses enable optical characterization and nonlinear studies of nanostructures.