NLMO Series Multi-mode Narrow Linewidth Laser

RealStable® NLMO Series Multi-Mode Narrow Linewidth Laser Module Product Introduction

1. Product Overview
The NLMO Series RealStable® multi-mode narrow linewidth laser module is independently developed by RealLight, serving as a high-power excitation light source customized for Raman spectroscopy and laser-induced fluorescence analytical instruments. The integrated unit embeds a laser drive circuit and high-precision TEC thermostatic cooling control system. With VBG wavelength locking technology, it realizes ultra-narrow linewidth output. Multi-mode fiber coupling delivers higher optical power, making it suitable for large-area sample testing and rapid batch detection scenarios.

Featuring compact dimensions and low overall power consumption, the module is equipped with standard PH2.0 hardware interface and USB digital communication port. The fiber outlet supports dual standard connectors FC/PC and SMA905, enabling rapid integration into desktop analyzers and portable field inspection equipment. Customization of wavelength, output power and mechanical structure as well as secondary development are supported. Matched with the full range of RL-RP Raman probes from our company, it forms a complete Raman detection system to meet the one-stop complete light source supporting demands of instrument manufacturers.

2. Core Product Advantages
2.1 Full-spectrum narrow linewidth with high side-mode suppression ratio for superior spectral purity
It covers seven mainstream excitation wavelengths: 532/638/785/808/830/981/1064 nm. Most models feature a spectral linewidth below 0.1 nm, while the linewidth of 808 nm and 981 nm variants is less than 0.3 nm. The side-mode suppression ratio (SMSR) exceeds 35 dB at 638 nm and reaches over 40 dB at 785/830/1064 nm, delivering outstanding stray light suppression capacity. It can effectively distinguish weak adjacent Raman characteristic peaks to avoid spectral overlap and distortion, greatly improving spectral resolution and signal-to-noise ratio. The 532 nm version adopts a solid-state laser architecture, while other wavelengths adopt high-power semiconductor solutions to accommodate testing of samples with varying degrees of fluorescence interference.

2.2 Extra-long-term wavelength and power stability for reproducible experimental data
A closed-loop TEC temperature control circuit is built in, with temperature drift controlled within ±0.1 ℃ under 4-hour continuous operation. It boasts excellent wavelength stability: the wavelength drift of the 532 nm model is ±5 pm, and that of all other wavelengths is uniformly ±7 pm. In terms of power stability, the RMS fluctuation of the 532 nm version is less than 3%, while the peak-to-peak fluctuation of 638/785/808/830/981/1064 nm versions is less than ±2%. No repeated calibration is required during long-duration continuous sampling, perfectly meeting stringent requirements of quantitative Raman and quantitative fluorescence detection.

2.3 High-power multi-mode output applicable to batch and large-area detection
Compared with single-mode narrow linewidth light sources, the NLMO series adopts a 105 μm / 0.22 NA large-core multi-mode fiber for output, with the maximum output power of a single unit reaching 800 mW. Higher luminous flux can rapidly excite dark, high-concentration and oversized samples to shorten single test duration, suitable for production line batch quality inspection and field rapid screening equipment.

2.4 Miniature low-power integrated design for easy equipment layout
The overall dimension is merely 76.2×63.5×22 mm with a weight below 150 g and typical overall power consumption lower than 5 W, only requiring low-voltage power supply of 5 VDC / 2 A. The output power can be continuously and steplessly adjusted from 0 to 100%, and stable emission is available after a standard 15-minute warm-up period. It can be easily installed inside confined equipment cavities and handheld portable devices without the need for high-power heat dissipation accessories.

2.5 Standard multi-interfaces supporting secondary development and complete set matching
The control terminal is equipped with dual interfaces: PH2.0 10Pin and USB, supporting upper computer power adjustment, equipment status reading and timing synchronization linkage of multiple instruments. The fiber output terminal is compatible with two universal connectors FC/PC and SMA905, which can be directly connected to commercial spectrometers and the full series of RL-RP Raman probes. The complete "laser + sampling probe" package reduces customers’ system development costs.

2.6 Wide temperature and humidity tolerance for stable indoor and outdoor operation
The standard operating temperature ranges from 10 ℃ to 35 ℃ (a heat sink is required for the device); the storage temperature ranges from 0 ℃ to 55 ℃ with storage relative humidity of 0 ~ 80% RH. It can operate stably for a long time in conventional laboratories and room-temperature portable field instruments, and minor fluctuations in temperature and humidity will not degrade spectral performance.

3. Main Application Fields
3.1 Raman Spectroscopy Detection (Core Application)
Matched with RL-RP series Raman probes, it is applied to non-destructive qualitative and quantitative analysis of minerals, polymers, lithium battery materials, pharmaceuticals, food and hazardous chemicals. The high-power multi-mode output adapts to portable field Raman instruments and industrial production line batch rapid detection equipment.

3.2 Laser-Induced Fluorescence Analysis
It is used for fluorescence spectrum collection of biological tissues, chemical raw materials and environmental pollutants. High excitation power enhances the signal intensity of weak-fluorescence samples, suitable for desktop fluorescence spectrometers and portable environmental detectors.

4. Product Summary
Featuring five core strengths including full coverage of seven wavelengths, high-power multi-mode output, pm-level wavelength stability, ultra-narrow spectrum and miniature low power consumption, the RealStable® NLMO Series multi-mode narrow linewidth laser module serves as the preferred domestic excitation light source for mass and large-area sample spectral testing. Standardized communication and fiber interfaces facilitate equipment integration and secondary development, and complete matching with all Raman probes is available. Its wide temperature and humidity adaptability satisfies both high-precision laboratory analysis and portable field detection scenarios. The high output power and excellent spectral purity significantly improve instrument testing efficiency and data repeatability. As a cost-effective alternative to imported multi-mode narrow linewidth light sources, it supports mass matching for spectroscopy instrument manufacturers, environmental monitoring equipment suppliers and medical testing equipment enterprises.