Fast Optical Signal Detection

InGaAs photodiodes are widely used for detecting wavelengths in the near-infrared (NIR) range. Compared with germanium detectors, InGaAs devices offer significantly higher shunt resistance and lower dark current, making them well-suited for sensitive measurements and other low-noise applications.

High-speed InGaAs photodiodes provide fast response times, high quantum efficiency, and excellent linearity across the near-infrared spectrum. These characteristics make them ideal for demanding applications such as fiber-optic communications, spectroscopy, optical sensing, and laser power monitoring, where accurate, stable detection of low-level signals is essential.
 

• Features

• Chip diameters from 60 μm to 300 μm
• Spectral response from 850 nm to 1700 nm
• Low dark current for high sensitivity
• Low capacitance for high speed (up to 2.5 GHz depending on package)
• Wide packaging variety: TO packages, fiber pigtails, chip on ceramic submount, and more

• Applications

• Optical communication
• Time-resolved fluorescence measurements
• LED/LD temporal characterization
• LiDAR
• Free Space Optics (FSO)

• Specifications

  Part Number	N17L10-T46	N17L30-T46	N17L30-T18	Units
  Optoelectronic Characteristics @ 23 ºC ± 2 ºC
  Active Diameter	100	300	300	μm
  Responsivity @ 850nm (min/typ)	0.1/0.2	0.1/0.2	0.1/0.2	A/W
  Responsivity @ 1300nm (min/typ)	0.8/0.9	0.8/0.9	0.8/0.9	A/W
  Responsivity @ 1550nm (typ)	0.95	0.95	0.95	A/W
  Dark Current @ 5V (max/typ)	1.0/0.5	5.0/1.0	5.0/1.0	nA
  Capacitance @ 5V (max/typ)	1.2/1.0	8.0/4.0	8.0/4.0	pF
  Bandwidth w/ 50 Ω-3dB	3	0.8	0.8	GHz min @ 5V
  Rise/Fall time RL = 50 Ω	0.1	0.4	0.4	nS max @ 5V
  NEP @ 1550nm (typ)	13 x 10-15	18 x 10-15	18 x 10-15	W/Hz1/2
  Package	TO-46 window cap	TO-46 window cap	TO-18 window cap
  Maximum Ratings @ 23 °C ± 2 °C
  Storage Temperture	-40 to 125	-40 to 125	-40 to 125	oC
  Operating Temperture	-40 to 85	-40 to 85	-40 to 85	oC
  Reverse Voltage	25	25	25	V
  Reverse Current	10	25	25	mA
  Forward Current	10	100	100	mA

Figure 1. lnGaAs Response vs. Wavelength vs. Temperature


Figure 2. lnGaAs Response vs. Wavelength vs. Temperature (Cont.)


Figure 3. Dark Current vs. Reverse Voltage vs. Diameter


Figure 4. Capacitance (pF) vs. Reverse Voltage (VJ vs. Diameter (mm)

• Packaging Capabilities 

• Package Outlines