The 1310 nm Fiber Laser from DK Photonics is a precision light source designed for applications that demand exceptional wavelength stability, narrow linewidth, and reliable long-term performance. Built around a high-quality DFB (Distributed Feedback) semiconductor laser chip and coupled to single-mode optical fiber, this source offers a well-controlled, low-noise 1310 nm output ideal for advanced optical test and measurement setups, fiber sensing networks, and fiber laser seeding. Its carefully engineered driving circuitry and integrated TEC (Thermo-Electric Cooler) guarantee stable operation over a wide temperature range, making it suitable for both laboratory and field environments.

Operating at a center wavelength of 1310 ± 0.5 nm with a typical linewidth of ≤3 MHz, this laser provides a coherent, spectrally pure source that is well matched to the low-dispersion window of standard telecom fiber. Compared with generic 1310 nm laser diodes or broadband SLED sources, the laser’s narrow spectral width and sideband rejection ratio better than 50 dB significantly reduce noise and unwanted spectral components, improving measurement accuracy and system signal-to-noise ratio. Output powers of 10 mW or 20 mW are available, covering a broad range of use cases from low-power interferometric sensing to higher power reference sources for component characterization.

The 1310 nm Fiber Laser is offered with either standard single-mode fiber (SMF‑28e) or polarization-maintaining PM1300 panda fiber to suit different system architectures. The SM output is ideal for general-purpose testing, loss measurements, and telecom-oriented R&D, while the PM version is optimized for coherent detection, high-precision interferometry, and polarization-sensitive fiber sensors. Both configurations are terminated with an FC/APC connector to minimize back-reflection and preserve stability, aligning with industry practice for high-performance fiber laser sources and ensuring compatibility with standard optical test equipment and fiber networks.

Short-term and long-term power stability are critical for repeatable measurements, and this 1310 nm Fiber Laser is engineered to meet these requirements. With short-term stability of ≤ ±0.02 dB over 15 minutes and long-term stability of ≤ ±0.05 dB over 8 hours, users can rely on consistent output without frequent recalibration. These performance metrics compare favorably with similar narrow-linewidth 1310 nm laboratory sources found in metrology and sensing applications, reducing drift-induced measurement errors and increasing confidence in long-duration experiments or monitoring systems.

To accommodate diverse integration needs, the laser is available in both desktop and compact module formats. The desktop version includes front-panel button control and an internal AC power supply (100–240 V), providing a ready-to-use solution for benchtop laboratories, production lines, and teaching environments. The module version, powered by 5 V DC with an RS232 control interface via DB9 connector, is optimized for OEM integration into larger systems such as fiber sensor interrogators, optical coherence setups, and automated test platforms. Both formats maintain the same optical performance while offering flexibility in how the source is deployed.

In demanding environments, thermal and environmental robustness are essential. The integrated TEC and control electronics maintain stable diode temperature, which is directly tied to wavelength and power stability. Operating across a temperature range of -5 to +55 °C and humidity from 0 to 70%, the laser source is well suited for use not only in controlled laboratories but also in more challenging industrial settings and in-field installations. This combination of narrow linewidth, high sideband suppression, excellent stability, and flexible packaging positions the 1310 nm Fiber Laser as a reliable, high-performance solution for fiber sensing, fiber laser seeding, optical device testing, and general photonic research at the important 1310 nm telecom wavelength.