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1550.12nm 50kHz FBG Single-Frequency Ultra-Narrow Linewidth Laser
MP-NL-1550.12-10-50k-B is a wavelength‑tunable, modulatable single‑frequency laser. The product is an external‑cavity tunable laser based on a built‑in FBG. It can be applied in optical measurement and inspection, optical sensor applications, and high‑precision OTDR applications. The product features excellent wavelength and power stability, as well as outstanding SMSR.
Product features:Built‑in optical isolator (optional);Single‑mode fiber output;Integrated current driver and temperature controller;+5 V power supply (AC/DC adapter included);Compact size (custom dimensions available);RoHS compliant
Part Number:MP-NL-1550.12-10-50k-B
Application area:High‑precision OTDR | Optical measurement equipment | Optical gas and chemical sensors
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Center Wavelength Output Power Linewidth
1550.12nm 10mW <50 kHz

Technical Parameters
14‑Pin Butterfly Package Laser Diode | Min. Power (mW) | Center Wavelength (nm) | SMSR (dB) | Linewidth (kHz) |
CLS051B‑S1260 | 5 | 1260±2 | >35 | <50 |
CLS051B‑S1383 | 5 | 1383±2 | >35 | <50 |
CLS101B‑S1550 | 10 | 1550±2 | >35 | <50 |
CLS051B‑S1648 | 5 | 1648±2 | >35 | <50 |
CLS081B‑S1653 | 8 | 1653±2 (typ. 1653.5 nm) | >35 | <50 |
CLS051B‑S1665 | 5 | 1665±2 | >35 | <50 |
Linewidth Test Data

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