Avalanche photodiode (APD) module LLAM-1550E-R2AH

Product Overview
The LLAM-1550E-R2AH is a high-speed, low-light analog avalanche photodiode (APD) receiver module integrating a 1550 nm InGaAs APD, a thermoelectric (TE) cooler and an integrated preamplifier in a hermetically sealed TO-66 flange package. The module offers 50 MHz bandwidth and a high damage threshold for demanding industrial sensing and optical communication tasks.

Series Description
The LLAM series pairs an APD chip, TE cooling and a preamplifier in a modified 12-lead TO-66 flange. The hermetic, RoHS-compliant design simplifies installation and provides enhanced heat sinking. TE cooling reduces noise and maintains stable responsivity across 5°C to 40°C ambient temperature, ensuring consistent analog detection performance.

Included Detector
LLAM-1550E-R2AH includes the Excelitas C30662EH InGaAs APD.

Applications

• Laser range finding
• Target recognition
• Distributed temperature sensing (DTS)
• Confocal microscopy
• Analytical instrumentation
• High-speed free-space optical communication

Specifications (excerpt)
Noise equivalent power: 150–180 fW/√Hz at 1300 nm; 130–160 fW/√Hz at 1550 nm.

Technical features

• Detector type: 1550 nm InGaAs APD (Excelitas C30662EH included)
• Receiver type: Analog APD receiver module with integrated preamplifier
• Bandwidth: 50 MHz
• APD active area: 200 µm
• Package: Modified 12-lead TO-66 flange, hermetically sealed
• Thermal management: TE cooler for lower noise and stable responsivity from 5°C to 40°C
• Compliance: RoHS
• High-damage threshold