A Guide to LK's DFB DML Laser Diodes

In today's hyper-connected world, the demand for faster, more reliable, and higher-fidelity data transmission has never been greater. From advanced military communications to the backbone of our cellular networks, transmitting high-frequency signals over long distances poses significant challenges for traditional systems.

At LK, we engineer solutions that don't just meet these challenges—they overcome them. Our portfolio of high-speed Distributed Feedback (DFB) Directly Modulated Laser (DML) diodes is designed to revolutionize how you transmit RF signals, offering unparalleled performance, reliability, and precision.

The RF-over-Fiber Game-Changers: NY13D, NY15D & NYCMD Series

Imagine transmitting microwave signals up to 18 GHz with the clarity and integrity of the original source. This is the reality with our NY13D, NY15D, and NYCMD series of directly modulated DFB laser diodes.

These modules are engineered as a superior alternative to conventional coaxial cable systems. By converting RF signals into light and transmitting them over fiber optic cable, we eliminate the signal loss, electromagnetic interference (EMI), and distance limitations associated with copper wiring. The key advantage is that the RF signal is transmitted in its original analog format, preserving signal quality and ensuring exceptional linearity.

Key Applications:

● Antenna Remoting: Place antennas in optimal locations without worrying about signal degradation over long cable runs.

● Cellular and PCS Networks: Enhance network performance and coverage with clean, reliable signal distribution.

● Telemetry, Tracking, and Control: Ensure mission-critical data is transmitted with maximum accuracy.

● Measurement and Delay Lines: Achieve high-precision timing and reference signal distribution for research and testing environments.

The Powerhouse for Optical Networks: The NY55D Series

For applications requiring a powerful and stable light source, the NY55D series stands in a class of its own. Characterized as a high-power, continuous-wave (CW) optical source, the NY55D is designed to work in tandem with external modulators.

This makes it the perfect heart for demanding CATV and Dense Wavelength Division Multiplexing (DWDM) networks, especially in super-trunking and large-scale distribution applications. With selectable wavelengths that comply with the ITU Grid recommendations and an impressive optical output power of up to 100 mW, the NY55D provides the raw power and stability needed to light up the most extensive fiber networks.

Why Choose LK's DFB Laser Diodes?

Our commitment to excellence is reflected in the core features and advantages built into every laser diode we produce.

● Exceptional Performance: With bandwidths reaching 18 GHz, a high dynamic range, and outstanding linearity, our lasers ensure your signal remains pure from point A to point B.

● Unmatched Reliability: A robust design allows for a wide operating case temperature range of -40°C to 70°C, guaranteeing performance even in the harshest environments.

● Precision and Stability: We pride ourselves on the superior wavelength stability and high precision of our lasers, which are critical for both analog link fidelity and DWDM channel integrity.

● Efficiency: Features like a low threshold current contribute to a more efficient and power-conscious system design.

The magic behind our directly modulated lasers lies in a simple yet elegant principle: the injection current is modulated directly by the input RF signal. This instantly changes the carrier concentration within the laser, which in turn modulates the optical output power. This direct, seamless conversion is the key to achieving high-fidelity transmission.