• Energy Efficiency:Passive receivers operate without any external power supply, eliminating power consumption and associated costs. This makes them environmentally friendly and suitable for applications where power availability is limited.  
• Cost-Effectiveness: Due to their simple design and fewer components, passive receivers are generally more cost-effective to manufacture and maintain compared to active receivers.
• Reliability: With fewer components, there are fewer potential points of failure, leading to increased system reliability and reduced maintenance requirements.
• Small Size and Weight: Passive receivers can be designed to be very small and lightweight, making them suitable for space-constrained applications such as in mobile devices or remote sensing systems.  
• Safety: Since they do not require external power, passive receivers eliminate the risk of electrical hazards, making them safer to use in various environments.
• Long Lifespan:Without the need for constant power supply, passive receivers can have a longer lifespan compared to active receivers, reducing the need for frequent replacements.

There is an applications and maintenance guide to passive optical receivers.