1550 Optical Transmitter

The main purpose of a 1550 Optical Transmitter is to enable long-distance transmission of data over fiber optic cables by converting electrical signals into optical signals.

The 1550 Optical Transmitter uses an electrical input signal and converts it into an optical signal through a process called modulation. The optical signal is then transmitted over a fiber optic cable.

The advantages of using a 1550 Optical Transmitter include low signal loss, high data capacity, resistance to interference, and the ability to transmit data over long distances without the need for repeaters.

Routine maintenance for a 1550 Optical Transmitter includes monitoring the power levels and wavelength stability, checking for any loose connections, and keeping the device clean from dust and debris.

This is a crucial choice that depends on your distance, budget, and performance requirements:

1550nm Directly Modulated Laser (DML) Transmitter:

How it works: The RF signal directly modulates the laser diode's current.

Best for: Cost-sensitive applications, CATV distribution networks, RFoG systems, and distances up to ~30-40 km.

Pros: Lower 1550nm optical transmitter price, simpler design, smaller footprint.

Cons: Higher chirp, which can limit transmission distance and performance in dense, long-haul DWDM systems.

1550nm Externally Modulated Laser (EML) Transmitter:

How it works: A continuous-wave (CW) laser feeds an external LiNbO₃ (Lithium Niobate) modulator, which is then modulated by the RF signal.

Best for: Long-haul telecom backbone (>80 km), DWDM/CWDM systems, applications requiring the highest CNR/CSO/CTB performance, and where very low chirp is essential.

Pros: Superior linearity, ultra-low chirp, enables much longer transmission distances.

Cons: Higher initial cost, larger size.

Simple Choice Guide:

Choose DML for standard CATV distribution and shorter links where budget is key.

Choose EML for maximum distance, backbone networks, or advanced multi-wavelength systems.

Yes, absolutely. JUNPU transmitters are designed to industry-standard specifications for CATV and broadcast optical transmission. They are fully compatible with standard DBC and SCM architectures used to minimize second-order distortion (CSO) in high-channel-count AM-VSB systems. Our units feature excellent linearity (CTB/CSO specs) and stable 1550nm output, ensuring seamless integration into your existing headend or hub. For specific compatibility verification, please provide your system's RF frequency plan, and our engineers can confirm optimal performance.

Our standard configuration uses SC/APC connectors, which provide low insertion loss and superior return loss critical for analog CATV systems to minimize reflections. We also offer FC/APC as a standard option. For OEM/ODM services, we can customize the connector type (e.g., LC/APC, E2000) to match your system requirements upon request.