1mm Active Area InGaAs PIN Photodiode

Box Optronics provides the 1mm Active Area InGaAs PIN Photodiode in a TO-46 hermetic package (Models: BPD-1STO46B-BL with ball lens and BPD-1STO46B-FW with flat window). Featuring a 1mm diameter InGaAs photosensitive area, wide spectral response from 900nm to 1650nm, high responsivity, low dark current, and low junction capacitance for near-infrared measurement and monitoring applications. The coaxial pigtail package is also optional.

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Product Description

Product Overview - 1mm Active Area InGaAs PIN Photodiode

The 1mm Active Area InGaAs PIN Photodiode (Models: BPD-1STO46B-BL and BPD-1STO46B-FW) from Box Optronics is a compact, high-sensitivity InGaAs PIN photodetector designed for near-infrared optical detection in the 900nm to 1650nm wavelength range. With a 1mm diameter active area, it provides a balanced combination of light collection capability, coupling tolerance, and detection performance for optical power measurement, fiber optic instrumentation, and optical monitoring applications.

Two TO46 package configurations are available: the BPD-1STO46B-BL with a ball lens window for improved coupling efficiency with focused or fiber-coupled optical signals, and the BPD-1STO46B-FW with a flat window for free-space optical detection and applications requiring a planar optical interface. Both versions feature hermetic TO46 metal packaging for reliable long-term operation.

Key Features-1mm Active Area InGaAs PIN Photodiode

· 1mm active area diameter

· Wide spectral response range: 900nm-1650nm

· High responsivity: 0.9A/W typical at 1310nm, 0.95A/W at 1550nm

· Low dark current and low junction capacitance

· Compact TO46 hermetic metal package

· Two window options:ball lens (BL) for improved coupling efficiency, flat window (FW) for free-space detection

Typical Applications-1mm Active Area InGaAs PIN Photodiode

· Optical power meters and optical power monitoring systems

· Fiber optic test and measurement equipment

· EDFA and optical amplifier power monitoring

· NIR spectroscopy and optical sensing systems

· Free-space optical detection applications

· Optical component characterization and calibration

· Photonics instrumentation and OEM integration

Product Specifications -1mm Active Area InGaAs PIN Photodiode

Absolute Maximum Ratings (TC = 25°C)

Parameter	Symbol	Rating	Unit
Reverse Voltage	VRmax	20	V
Operating Case Temperature	TOP	-40 ~ +85	°C
Storage Temperature	TST	-55 ~ +120	°C

Electro-Optical Characteristics (TC = 25°C)

Parameter	Symbol	Test Condition	Min.	Typ.	Max.	Unit
Active Area Diameter	φ	-	-	1	-	mm
Spectral Response Range	λ	-	900	-	1650	nm
Responsivity at 1310nm	R	-	0.85	0.9	-	A/W
Responsivity at 1550nm	R	-	-	0.95	-	A/W
Operating Voltage	V	VR = -5V	-	-	-5	V
Dark Current	Id	VR = -5V	-	1.5	5.0	nA
Junction Capacitance	C	VR = -5V, f = 1MHz	-	50	80	pF
3dB Bandwidth	Bw	VR = 0V, RL = 50Ω	-	40	-	MHz

Package and Pin Definition -1mm Active Area InGaAs PIN Photodiode

Package Type: TO46 Hermetic Metal Package

Ball lens:

Flat window:

Ordering Information -1mm Active Area InGaAs PIN Photodiode

Model Nomenclature

BPD - X X TO XX - X - X

Example: BPD-1STO46B-FW

Field	Code	Description
Product Series	BPD	Box Photodiode Series
Active Area Size	1S	1S = 1mm diameter (1S=1mm, 2S=2mm, 3S=3mm, 5S=5mm)
Package Type	TO46	TO46 hermetic metal package
Sub-type	B	B type pin
Window Type	BL / FW	BL = Ball Lens; FW = Flat Window

Datasheet -1mm Active Area InGaAs PIN Photodiode

BPD-1STO46B-BL

BPD-1STO46B-FW

Frequently Asked Questions (FAQ)

Q: What is the difference between the BL (ball lens) and FW (flat window) versions?

A: The BPD-1STO46B-BL features a ball lens window that improves optical coupling efficiency by focusing incident light onto the 1mm active area. It is suitable for fiber-coupled optical signals, focused beams, and applications requiring higher coupling tolerance, such as optical power measurement and fiber optic test equipment.

The BPD-1STO46B-FW features a flat optical window without focusing optics, providing a direct optical interface for free-space optical detection and measurement applications where maintaining the original beam profile is important.

Both versions use the same InGaAs PIN photodiode chip and TO46 hermetic package, while the optical window configuration can be selected according to the coupling method and application requirements.

Q: What wavelength range can this 1mm InGaAs photodiode detect?

A: This InGaAs PIN photodiode provides a broad near-infrared spectral response range from 900nm to 1650nm, covering commonly used optical wavelengths including 1310nm and 1550nm communication bands. Responsivity is specified at 1310nm (0.9A/W typical) and 1550nm (0.95A/W typical). It is suitable for optical power measurement, laser monitoring, optical sensing, and instrumentation applications requiring reliable NIR detection.

Q: What is the minimum order quantity (MOQ)?

A: The MOQ for the 1mm InGaAs PIN Photodiode TO46 is 1pc. We support flexible order quantities, from single units for R&D and prototyping to larger volumes for instrument production and OEM programs.

Q: Can I get a fiber pigtailed version of this 1mm Active Area InGaAs PIN Photodiode ?

A: Yes. Box Optronics also provides fiber pigtailed InGaAs photodiode modules with connector options for direct fiber connection. These modules integrate the InGaAs photodiode chip with fiber coupling in a compact package, suitable for OEM integration into optical instruments and fiber optic systems.