With the turnkey 100% solid-state LXM laser, indie introduces a key building block for seamless integration in sensing applications requiring low frequency noise and precise frequency tuning at a high sampling rate. The LXM sets a new standard for enhanced detection by delivering low noise, high optical power, and a narrow-linewidthhallmarks of superior laser sources and essential elements for successful applications. The LXM-S features a typical linewidth of 15 kHz,…
Narrow-linewidth lasers are increasingly sought after for their remarkable low frequency noise and high temporal coherence, making them indispensable in advanced applications such as high-resolution spectroscopy, long-range fiber sensing, and coherent light detection and ranging (LiDAR). Their ability to deliver precise, stable outputs has propelled their adoption across industries requiring fine optical control. However, as these lasers become more prevalent, accurately characterizing their performance has grown more critical—and more complex.…
Distributed acoustic sensing (DAS) relies on the scattering of light in optical fibers to detect perturbations on the fiber itself along its length. Since the scattering signal is weak, efforts continue to be made to improve the sensitivity of DAS, as well as its spatial resolution and maximum sensing range. To that end, coherent detection methods are commonly used. These methods put strong requirements on the coherence length and stability…
In a joint presentation by indie (former EXALOS) and customer FIBER OPTICAL SOLUTIONS (FOS) at the 61th DGON ISA symposium, experts from both companies demonstrated a novel integrated 1550 nm 3-fiber SLED transceiver module and its application in a high-precision Inertial Measurement Unit (IMU) for navigation. The symposium took place in Brunswick (Braunschweig), Germany at October 22-23, 2024, as a face-to-face event. indie’s (former EXALOS) developer Stefan Gloor presented the…
Narrow-Linewidth DFB Laser Diode with Unique Modulation ResponseEdge-emitting distributed feedback laser (DFB) diodes are small-sized laser sources that can be produced in high volumes at a low cost. They are widely deployed in telecommunication systems and have proven to be reliable over years of continuous operation. DFB diodes typically exhibit high levels of spontaneous emission resulting in frequency noise that may negatively affect the performance of some applications. Commercially available…
In the realm of distributed acoustic sensing (DAS), where valuable data is extracted from the faint signals backscattered by optical fibers, technological advancements continue to push the boundaries of what’s possible. The use of narrow linewidth lasers has proven to be instrumental in enhancing spatial resolution, extending sensing distances, and expanding the frequency range of DAS systems. Narrow linewidth lasers offer precise and stable wavelength output, making them indispensable components…
Introduction Linearly polarized fiber lasers are required in many applications such as sensing, nonlinear frequency conversion, and for coherent or polarization beam combining. To obtain linearly polarized fiber lasers, a polarizer can be used at the output or inside the fiber laser cavity to select a single polarization. But this technique presents several disadvantages such as increased cost, higher insertion losses, power limitations, and reliability issues. A much more effective…
Fiber Bragg gratings can be used to obtain different wavelength reflectivity profiles that depend on the refractive index pattern that is inscribed in the fiber. By relying on proven in-house design and simulation tools and state-of-the-art grating inscription methods, unique ultra-narrowband fiber-based optical filters can be realized. In addition to a bandwidth (BW) that can be as narrow as 2 GHz or 50 MHz, depending on the type of filter, fiber Bragg…
