Overview of the 1.5µm Fiber Laser Technology

The 1.5µm wavelength band is a preferred choice for advanced optical solutions due to its eye-safe characteristics, low atmospheric attenuation, and excellent compatibility with telecom-grade components. The 1.5μm High-Reliability Single-Frequency Fiber Laser series uses carefully engineered fiber structures to maintain exceptional coherence, thermal stability, and long-term reliability. This wavelength region offers excellent performance in free-space and fiber-based applications, strong reliability under continuous operation, and lower sensitivity to optical feedback compared with shorter wavelengths. By combining advanced fiber Bragg gratings, low-noise pump sources, and stable cavity designs, this platform maintains high spectral purity even in challenging operating environments.

Key Performance Features

• Narrow linewidth single-frequency output optimized for coherent detection, distributed sensing, and precision measurement tasks.
• Low relative intensity noise and minimal frequency fluctuation for stable operation under CW, long-pulse, or advanced modulation formats.
• High environmental reliability through robust fiber-based construction that resists vibration, temperature shifts, and acoustic disturbance.
• Compact, integrated all-fiber architecture that minimizes alignment issues and supports long operational lifetimes.
• Near-diffraction-limited beam quality suitable for long-range communication links, LIDAR, spectroscopy, and precision optical testing.

Design Architecture

The 1.5μm High-Reliability Single-Frequency Fiber Laser adopts an all-fiber cavity design that uses precise gratings and optimized optical components to maintain stable single-longitudinal-mode operation. High-quality pump modules ensure consistent output power and contribute to extended service life. The laser is paired with a low-noise electronic control unit that provides high stability, real-time monitoring, and controlled thermal management for the cavity and pump diodes. Optional configurations support phase, frequency, and amplitude modulation, enabling integration into sensing, communication, and coherent detection systems that require precise modulation control.

Technical Advantages

• Stable single-frequency operation that minimizes mode hopping and maintains consistent phase and frequency behavior over long operation cycles.
• Efficient thermal management through optimized cavity and package design, ensuring stable spectral characteristics and power output during continuous use.
• Flexible output power options, allowing selection from milliwatt-level to higher-power versions depending on laboratory, industrial, or field deployment needs.
• Integration-ready electrical interface that simplifies connection with digital control units, modulation hardware, supervisory systems, and monitoring platforms.

Applications of the 1.5µm Single-Frequency Laser

The 1.5μm High-Reliability Single-Frequency Fiber Laser is suitable for a wide range of scientific, industrial, and engineering applications where stable single-frequency operation and high coherence are critical. In optical coherent communication systems, its phase stability and low noise help maintain signal integrity over long-distance links. For distributed fiber sensing, including DAS, DTS, DSS, and other phase-sensitive monitoring schemes, its stable frequency output supports high-resolution, long-range measurements. The eye-safe 1.5µm band is also widely used in LIDAR and remote sensing platforms that require low atmospheric absorption and robust detection performance. In spectroscopy and material analysis, the narrow linewidth and stable wavelength enable precise interrogation of spectral features, while in metrology and calibration the laser provides a reliable optical reference for interferometers and frequency standards.

Reliability and Quality Standards

This product line is manufactured under rigorous quality-controlled processes to ensure consistent performance and long-term dependability. Each unit is tested to verify stable output power, spectral purity, and resistance to environmental influences such as temperature variation and mechanical vibration. The overall design reflects the high reliability expected from advanced fiber laser systems deployed in scientific laboratories, industrial facilities, and demanding field environments. Core components, including pump diodes, fibers, and gratings, are selected and qualified to meet international standards for optical performance and operational lifetime.

Why Choose This 1.5µm Laser Platform

• Long-term wavelength and frequency stability for mission-critical optical systems.
• High manufacturing quality supported by strict production and test procedures.
• Excellent optical coherence and narrow linewidth tailored for coherent and interferometric applications.
• Application flexibility across communication, sensing, metrology, and industrial usage scenarios.
• Strong performance under varying environmental conditions, including temperature changes and mechanical disturbance.

Support and Customization Options

System integrators and engineering teams can select from a range of customization options to match their specific system requirements. Available configurations include custom output power levels, specific linewidth targets, tailored modulation capabilities, and different fiber connector or pigtail options. OEM module versions can be provided for compact or embedded integration. Techwin’s engineering team offers detailed technical support and integration guidance to help optimize performance in your target application. Whether the priority is maximum stability, a defined tuning range, or a specific mechanical layout, the 1.5μm High-Reliability Single-Frequency Fiber Laser platform can be adapted to serve as a dependable core source for advanced optical systems.