Narrow Linewidth ER Fiber Laser

Product Introduction: Narrow Linewidth Erbium (ER) Laser

Narrow Linewidth Erbium (ER) Lasers are high-precision light sources that deliver stable, single-frequency output in the 1.5 µm wavelength region with spectral linewidths as low as <0.1 kHz to <1 kHz . Operating primarily in the eye-safe C-band (typically 1525-1610 nm), these lasers combine the reliability of fiber optic technology with ultra-low noise performance, making them essential for the most demanding scientific and industrial applications.

Key Features

• Ultra-Narrow Linewidth & Single-Frequency Operation: Guarantees exceptional temporal coherence with linewidths typically <0.1 kHz to <5 kHz, ensuring stable, mode-hop-free, single longitudinal mode (SLM) output .

• Wide Range of Output Powers: Available in various configurations to suit different needs:

  • Low Power (Module): 5 mW to 100 mW for compact integration .

  • Medium Power: 1W to 15W for general-purpose applications .

  • High Power (MOPA): Up to 40W for demanding tasks like pumping nonlinear systems or long-range LiDAR .

• Ultra-Low Noise Performance: Features exceptionally low phase noise, frequency noise, and relative intensity noise (RIN). High-performance models achieve RIN values as low as -165 dBc/Hz in certain frequency ranges .

• Excellent Beam Quality & Polarization: Diffraction-limited output with an M² < 1.1 and high polarization extinction ratio (PER > 20-23 dB) .

• Wavelength Flexibility & Tuning: Available at fixed ITU wavelengths (e.g., 1550.12 nm, 1560.48 nm) or custom wavelengths across the C-band . Offers both coarse temperature tuning (>1 nm) and fast frequency modulation (e.g., >3-10 GHz via PZT or >500 MHz via current) .

• Robust & Compact Design: Engineered with high-temperature and vibration resistance for reliable operation in both laboratory and field-deployed systems .

Applications

The superior coherence and stability of Narrow Linewidth Er Lasers make them ideal for high-precision applications :

• Sensing & Metrology:

  • Coherent LiDAR for autonomous driving and wind sensing .

  • Distributed Fiber Optic Sensing (e.g., for pipeline monitoring, seismic detection) .

  • Fiber Optic Hydrophones .

  • Interferometry .

• Quantum & Atomic Physics:

  • Cold Atom Physics (cooling and trapping) .

  • Quantum Computing .

  • Atomic Clocks .

• Scientific Research:

  • Laser Spectroscopy and gas absorption measurement .

  • As a pump source for mid-infrared parametric oscillation .

• Communications:

  • Coherent Optical Communication systems .

  • Frequency-doubling to generate visible light .

This combination of ultra-narrow linewidth, high power, and low noise positions the Narrow Linewidth ER Laser as a critical enabling technology for advancing precision measurement, quantum technologies, and next-generation sensing systems.