Agiltron Fiber Coupled High-Speed InGaAs PIN Photodiode

Product Overview

The Fiber Coupled High-Speed InGaAs PIN Photodiode is based on a unique package featuring a high-speed, fast rise and fall response. The component integrates a fiber with a high-sensitivity photodiode for signal detection. The response is analog without TIAC. Agiltron's design minimizes component assembly costs and module footprint while increasing stability over wide temperature and wavelength ranges. They offer three response speeds: 200MHz, 2.5GHz, and 5GHz. The slow version uses a larger detector size for higher efficiency, while the fast version uses a smaller detector size to increase response speed. Associated sensor electronic amplifier is also available.

? Applications

• Channel Monitoring
• Power Monitoring in Optical Interface Modules
• Gain Monitoring for Amplifier
• Instruments

✨ Features

• Low Cost
• Large Bandwidth
• Fast Response (ns)
• High Reliability

Specifications

Notes:

• [1]. The net responsivity is defined as the ratio of the PD current output and optical power measured at output fiber.
• [2]. Single Mode Fiber version only.
• [3]. PM Fiber version only.
• [4]. Directivity defines the responsivity contrast between the case that light power comes from input fiber port and the case that light power comes from output fiber port. From 1260 to 1620nm.

Note: The specifications provided are for general applications with a cost-effective approach. If you need to narrow or expand the tolerance, coverage, limit, or qualifications, please ? click this link.

⚠️ Warning: The device is extremely ⚡ ESD-sensitive. Its dark current increases by unprotected handling. It is recommended to be handled under a certified ion fan once the package is removed.

Mechanical Footprint Dimensions (mm)

The standard package for the infrared band is depicted. For other wavelength bands, dimensions may vary due to special detector configurations.

Diagram Description: A diagram shows the physical outline of the photodiode component. Key dimensions indicated are approximately 5.90mm, 14.00mm, 3.40mm, 15.50mm, and 10.50mm. It shows connection points labeled PD+ and PD-, and GND.

*Product dimensions may change without notice. This is sometimes required for non-standard specifications.

PD PIN Assignments

Diagram Description: A bottom view shows the pin assignments for the photodiode. Type A configuration lists:

• [1] PD +
• [2] PD -
• [3] CASE

Ordering Information

The ordering information is structured by Prefix, Wavelength, Speed, Package, Fiber Type, Fiber Cover, Fiber Length, and Connector. Specific codes are provided for each parameter:

• Prefix: FCHI- (800-1600 = 1, Special = 0)
• Wavelength: (e.g., 800-1600 = 1)
• Speed: 0.2GHz = 8, 2.5GHz = 2, 5GHz = 5, 5MHz = 6
• Package: Standard = 1, Special = 0
• Fiber Type: Choose from table below
• Fiber Cover: 0.9mm tube = 3, Bare fiber = 1, Special = 0
• Fiber Length: 0.25m = 1, 0.5m = 2, 1.0 m = 3, 1.5 m = 5, Special = 0
• Connector: None = 1, FC/PC = 2, FC/APC = 3, SC/PC = 4, SC/APC = 5, ST/PC = 6, LC/PC = 7, LC/APC = A, LC/UPC = U, Special = 0

Fiber Type Selection Table:

Application Notes

Fiber Core Alignment

Note that the minimum attenuation for these devices depends on excellent core-to-core alignment when the connectors are mated. This is crucial for shorter wavelengths with smaller fiber core diameters that can increase the loss of many decibels above the specification if they are not perfectly aligned. Different vendors' connectors may not mate well with each other, especially for angled APC.

Fiber Cleanliness

Fibers with smaller core diameters (<5 µm) must be kept extremely clean. Contamination at fiber-fiber interfaces, combined with the high optical power density, can lead to significant optical damage. This type of damage usually requires re-polishing or replacement of the connector.

Maximum Optical Input Power

Due to their small fiber core diameters for short wavelength and high photon energies, the damage thresholds for the device are substantially reduced compared to the common 1550nm fiber. To avoid damage to the exposed fiber end faces and internal components, the optical input power should never exceed 20 mW for wavelengths shorter than 650nm. Agiltron produces a special version to increase handling by expanding the core side at the fiber ends.

Spectral Response

Diagram Description: A line graph titled "Spectral Response" shows the relationship between Wavelength (nm) on the x-axis (ranging from 800 to 1700 nm) and Responsivity (A/W) on the y-axis (ranging from 0.2 to 1.2). The curve indicates that responsivity starts low at 800nm, gradually increases to a peak around 1500-1600nm, and then slightly decreases towards 1700nm.

Typical Performance for 5GHz

Diagram Description: A line graph titled "Typical Performance for 5GHz" plots Frequency (GHz) on the x-axis (ranging from 0.55 to 6.55 GHz) against Response (dB) on the y-axis (ranging from -36 to 15 dB). A horizontal red line indicates the "-3dB Bandwidth" at approximately 5.9GHz, showing the frequency response roll-off.

Typical Response @ 1550nm

Diagram Description: A line graph titled "Monitor Current vs Laser Power" shows Laser Power (mW) on the x-axis (ranging from 0 to 50 mW) and Monitor Current (mA) on the y-axis (ranging from 0.0 to 8.0 mA). The graph illustrates a non-linear relationship where monitor current increases with laser power, showing a slight saturation at higher power levels.

Amplifier Mounted Option

Agiltron offers a Low-Noise Optical Detector Amplifier (Model: DETA-11A221111) for use with their photodiodes. The price is $165.

More information can be found at: https://agiltron.com/product/precision-optical-detector-amplifier/