The MARS Series C-band high power optical fiber amplifiers are engineered for demanding applications that require high output power, low noise, and long‑term operational stability. Based on advanced double‑cladding fiber amplification technology and an all‑fiber integrated architecture, these amplifiers deliver output powers from 1 W up to 20 W in the 1540–1565 nm wavelength band. This power range makes them highly suitable for applications such as nonlinear optics research, high power optical amplification stages, fiber optic sensing, long‑haul optical fiber communication, and general research and development in photonics laboratories.

Unlike basic EDFAs that are limited to hundreds of milliwatts, the MARS Series employs high‑power, high‑performance multimode pump sources combined with optimized double‑clad fiber designs to achieve high conversion efficiency and robust beam quality. The internal optical layout is carefully designed to handle high optical densities while maintaining excellent signal integrity. This ensures that even at watt‑level output powers, the amplifier preserves low noise figures (typically < 5.5 dB at 0 dBm input) and a high degree of isolation between input and output, which is critical for sensitive experimental setups and system‑level deployments.

Operational reliability is further enhanced by a proprietary thermal treatment and management strategy. The double‑cladding gain fiber and associated components are thermally engineered to support long‑term stable operation at elevated power levels. This thermal robustness helps minimize power drift, ensuring output power stability within ±1% (over 8 hours under nominal conditions) after warm‑up. As a result, the MARS Series is well suited for continuous‑wave (CW) operation in environments where consistent output and minimal maintenance are essential, such as 24/7 test platforms, sensor interrogation units, and high‑power pre‑amplifiers or boosters in communication systems.

To protect both the amplifier and the connected optical infrastructure, the system incorporates a fast‑response protection circuit. This circuit continuously monitors the input and output optical power in real time. If the input signal drops or is suddenly disconnected, the internal controller automatically shuts down the high‑power pump diodes. This rapid protection mechanism prevents damage from back‑reflections or uncontrolled lasing, improving safety for the overall system and extending component lifetime. Such intelligent protection is particularly valuable in nonlinear optics experiments or sensing configurations, where test conditions may change abruptly.

The MARS Series is designed as a turnkey solution with an embedded microprocessor for intuitive local control and monitoring. A front‑panel LCD interface clearly displays key operating parameters such as pump current, module temperatures, input/output power levels, and system status messages. Built‑in alarms and warning messages notify the user of abnormal conditions, helping operators quickly diagnose issues and maintain optimal operating points. The output power can be adjusted over a wide tuning range (typically 10–100% of rated power), enabling fine optimization of the amplification level for different experimental configurations or system requirements.

Input and output interfaces are designed for straightforward integration into existing fiber networks and laboratory setups. The amplifier typically accepts standard SMF‑28‑type single‑mode fiber (SMF 9/125 μm, NA ≈ 0.13) at the input, while the output can be provided either on standard single‑mode fiber or on large mode area (LMA) fiber depending on the desired power handling and beam characteristics. The default optical connector is FC/APC to minimize back‑reflections, with other connector options available on request. A minimum output fiber length of more than 1 m facilitates convenient routing and connection to downstream components such as nonlinear fibers, interferometers, or sensor arrays.

In terms of electrical and mechanical design, the MARS Series supports a wide AC input range (100–240 V), making it compatible with global mains standards and suitable for deployment in diverse laboratory or industrial environments. Maximum power consumption is typically on the order of 100 W, reflecting efficient pump diode and thermal management design. The amplifiers are available in standard 19″ rackmount enclosures, generally in 2U or 3U heights depending on the output power configuration. This format allows easy integration into existing test racks and system cabinets commonly used in communication and sensing infrastructures.

The family offers multiple standard output power options, including 1 W, 5 W, 10 W, and 20 W, with custom configurations available on request. Output power levels are specified at 0 dBm input over the 1540–1565 nm operati