NLM Series Multi-mode Narrow Linewidth Laser

RealLight NLM Series RealStable® Multi-Mode Narrow Linewidth Laser Product Introduction

1. Product Overview
The RealStable® NLM Series multi-mode narrow linewidth laser is a flagship desktop narrow-linewidth light source independently developed by RealLight. It adopts VBG volume Bragg grating wavelength locking plus built-in closed-loop TEC thermostatic cooling architecture to deliver ultra-narrow linewidth, highly stable multi-mode laser output. Covering seven mainstream excitation wavelengths: 532 / 638 / 785 / 808 / 830 / 981 / 1064 nm, the maximum output power reaches 800 mW, perfectly suited for high-precision analytical applications including Raman spectroscopy, fluorescence detection and laser pumping.
The system comes with dedicated upper computer control software supporting real-time status monitoring and online firmware upgrade. Standard safety features include emergency stop switch, 0~5 V analog modulation and USB digital communication. Fiber ports are compatible with universal FC/PC and SMA905 connectors. Matched with RealLight full-series RL-RP Raman probes and dedicated Raman analysis software, it forms an integrated spectral detection system. Custom higher power versions are available for laboratory desktop instruments and industrial on-site detectors.

2. Core Product Advantages
2.1 Ultra-narrow spectrum & high side-mode suppression for superior spectral resolution
Except 808 nm and 981 nm with linewidth below 0.3 nm, all other variants achieve linewidth ＜0.1 nm. Side-mode suppression ratio (SMSR) exceeds 35 dB @638 nm and over 40 dB @785 / 830 / 981 / 1064 nm, delivering outstanding stray light rejection. It effectively separates faint adjacent Raman peaks and eliminates baseline noise to greatly boost SNR for weak-signal samples. The 532 nm model adopts solid-state design while others are high-power semiconductor architectures to fit samples with varying fluorescence interference.

2.2 Closed-loop TEC cooling for long-term ultra-stable wavelength & power
Embedded independent thermoelectric cooling circuit limits temperature drift within ±0.1 ℃ over 4-hour continuous operation. Wavelength stability: ±5 pm @532 nm, ±7 pm for all other bands. Power stability: RMS fluctuation ＜3% @532 nm, peak-to-peak fluctuation ＜±2% for remaining wavelengths. No frequent calibration is required during long sampling cycles, meeting strict standards of quantitative Raman, fluorescence quantification and metrology calibration.

2.3 High-power multi-mode output for large-area & batch testing
Equipped with 105 μm / NA 0.22 large-core multi-mode delivery fiber, the maximum output power hits 800 mW with sufficient luminous flux. It rapidly excites dark, high-concentration and oversized samples to shorten single test time, ideal for production line mass inspection, large field sample screening and large-area biological tissue fluorescence imaging.

2.4 Comprehensive electronic control system with intelligent operation
Dedicated PC software enables real-time monitoring of temperature, power and fault information, as well as remote online firmware update. Hardware emergency stop ensures operational safety; 0~5 V analog modulation input supports timing generator linkage for pulse modulation. Output power is continuously adjustable from 0 to 100%, with stable emission available after 15-min warm-up, offering great compatibility for automated equipment integration.

2.5 Standard communication & fiber ports for complete matching
USB communication interface and dual FC/PC & SMA905 fiber connectors directly match mainstream commercial spectrometers. One-stop complete solution with RL-RP Raman probes and professional Raman analysis software cuts R&D and integration costs for instrument manufacturers.

2.6 Wide temperature & humidity tolerance for reliable desktop operation
Operating temperature ranges from 10 ℃ to 35 ℃; storage temperature -10~60 ℃ with relative humidity 0~80% RH. Stable performance is maintained in constant-temperature labs and ordinary industrial workshops without wavelength shift or power attenuation caused by mild ambient fluctuations. Standard compact chassis weighs only 1.2 kg with dimension 180×102×180.2 mm for easy placement and equipment installation.

3. Main Application Fields
3.1 Raman Spectroscopy (Core Application)
Matched with RL-RP Raman probes and supporting analysis software for non-destructive qualitative & quantitative testing of minerals, polymers, lithium batteries, pharmaceuticals, food and hazardous chemicals, suitable for laboratory desktop Raman and industrial on-line quality inspection equipment.

3.2 Laser-Induced Fluorescence Analysis
Fluorescence spectrum acquisition of biological tissues, chemical raw materials and environmental pollutants. High excitation power enhances weak fluorescence signals for desktop fluorescence spectrometers and microscopic fluorescence imaging systems.

3.3 Laser Pump Source
Serves as auxiliary pumping excitation light source for microchip lasers, nonlinear optical experiments and compact solid-state lasers; stable narrow-linewidth output guarantees consistent performance of laser systems.

4. Product Summary
Integrating six core strengths — full seven-wavelength coverage, ultra-narrow linewidth, high side-mode suppression, pm-level wavelength stability, high-power multi-mode delivery and intelligent upper-computer control system — the NLM series acts as a leading domestic excitation source for desktop high-precision spectroscopic instruments. Featuring standardized chassis, complete control functions, modulation capability, remote upgrade and emergency safety protection, it can be fully matched with Raman probes and analysis software. Widely adopted by university research labs, industrial quality inspection and biomedical instrument manufacturers, it delivers cost-competitive performance equivalent to imported desktop narrow linewidth lasers.