The 1570 nm Fiber Laser from DK Photonics is a high-performance, single-frequency laser source engineered for applications that demand narrow linewidth and exceptional power stability. Built around a high-quality DFB semiconductor laser chip with single-mode fiber output, this source delivers a highly coherent, low-noise optical signal centered at 1570 nm. The device is carefully integrated with a professional-grade driving circuit and TEC (thermoelectric cooler) control, ensuring reliable wavelength and power stabilization over a wide range of operating conditions.

Designed to meet the needs of advanced fiber sensing, fiber laser seeding, and optical component characterization, this 1570 nm fiber laser combines laboratory-grade stability with flexible deployment options. Users can choose between standard single-mode (SMF-28e) and polarization-maintaining (PM1550 panda) fiber outputs, enabling precise control of polarization where system performance depends on it. The available output power range of 10, 20, 30, 33, or 37 dBm supports both low-power interrogation schemes and higher-power test and measurement setups, while the narrow spectral linewidth of ≤0.1 nm and sideband rejection ratio above 50 dB deliver clean, high-quality spectra suitable for interferometric and coherent detection systems.

For system integration and laboratory use, the 1570 nm Fiber Laser offers two packaging formats: a compact module and a convenient desktop unit. The modular version, with 5 V DC low power consumption, is ideal for OEM integration into rack-mounted or portable systems, providing RS232 control and a DB9 interface for straightforward communication and remote management. The desktop version is tailored to benchtop operation, featuring an intuitive button-based interface and universal 100–240 V AC power input that simplifies deployment in diverse lab and production environments.

The laser’s stability specifications are tuned for demanding, long-duration measurements. Short-term power stability is maintained within ±0.02 dB over 15 minutes, while long-term drift is constrained to within ±0.05 dB over 8 hours, aligning with or exceeding the performance of comparable narrow-linewidth telecom-band fiber lasers on the market. This level of stability is particularly important in distributed fiber sensing (DTS, DAS, and related techniques), precision metrology, and high-resolution optical spectrum analysis, where even small fluctuations can adversely affect measurement accuracy and repeatability.

Operating across a broad temperature range from -5°C to +55°C and a humidity range of 0–70%, the 1570 nm Fiber Laser is suitable for both controlled laboratory environments and more demanding field conditions. The standard FC/APC optical connector minimizes back-reflections, preserving coherence and protecting the laser diode. Together with its configurable wavelength band, power levels, and fiber types, this source provides a robust, versatile platform for developers and researchers building fiber sensors, seeding fiber amplifiers or lasers around the 1.5 µm window, and evaluating optical components such as filters, multiplexers, and interferometric devices.

With a well-balanced combination of narrow linewidth, low noise, high sideband suppression, and flexible packaging, the DK Photonics 1570 nm Fiber Laser stands as a reliable, cost-effective solution for modern fiber-optic systems. Its performance characteristics and integration options make it an excellent choice for laboratories, manufacturers, and OEMs seeking a stable, telecom-band laser source for precision sensing, laser development, and optical device testing.