Offshore Price Optical Receiver DML

The offshore price of optical receivers with directly modulated lasers (DMLs) typically depends on modulation speed, wavelength, and vendor, with DML-based modules generally being more cost-effective than EML-based alternatives.

Overview of DML Optical Receivers

Directly modulated lasers (DMLs) are widely used in optical transceivers for short- to medium-range fiber links, typically up to 10 km at 25 Gbps . DMLs modulate light by varying the drive current directly, eliminating the need for an external modulator, which reduces both cost and power consumption compared to externally modulated lasers (EMLs), . They are commonly integrated into optical receivers for 100G QSFP28 modules and similar applications. Optical receivers convert incoming optical signals into electrical signals using photodiodes followed by low-noise, high-bandwidth amplifiers. Amplified receivers provide higher sensitivity and dynamic range, while balanced receivers are ideal for noise-sensitive applications . The choice of receiver depends on the required bandwidth, link distance, and signal quality.

Cost Factors

The price of a DML-based optical receiver offshore is influenced by several factors:

• Laser Type and Modulation Bandwidth: DMLs are cheaper than EMLs but more expensive than VCSELs. Modules with higher modulation speeds (e.g., 25 Gbps or above) or longer wavelength operation (e.g., 1550 nm) command higher prices .
• Integration and Features: Receivers with built-in amplifiers, temperature stabilization (TEC), polarization-maintaining fiber, or remote control interfaces (RS485) are more expensive .
• Volume and Vendor: Bulk orders from manufacturers like Lumentum, Coherent, or Broadcom may reduce per-unit cost, while small quantities or specialized modules can be significantly higher .
• Market Trends: The global expansion of 5G and data center networks is increasing demand for DML modules, which can affect pricing due to supply constraints .

Typical Price Range

While exact offshore prices vary by supplier and configuration, DML-based optical modules for 100G QSFP28 links generally range from $500 to $1,500 per unit, depending on speed, wavelength, and additional features . Modules with advanced features like polarization-maintaining fiber or TEC stabilization may exceed this range. For precise pricing, contacting vendors directly is recommended, as they can provide quotes based on quantity, shipping, and technical specifications.

Performance Considerations

DML receivers are suitable for short- to medium-range links but may experience chromatic dispersion and waveform distortion at higher speeds or longer distances . End-to-end optimization, including bias current tuning and digital signal processing, can improve performance and maximize throughput . For links beyond 10 km or high-speed 400G applications, EML or CW lasers may be preferred despite higher cost.

Summary

DML-based optical receivers offer a cost-effective solution for short- to medium-range fiber links, balancing performance and price. Offshore pricing is influenced by modulation speed, wavelength, integration features, and vendor, typically ranging from $500 to $1,500 per module. For accurate pricing, direct vendor consultation is essential, especially for specialized or high-volume orders.