The 940nm 50mW Laser Diode is a compact continuous-wave semiconductor laser supplied in a standard TO-18 (5.6mm) package with an integrated PIN monitor photodiode for optical-output monitoring. It delivers 50mW CW optical output at a typical lasing wavelength of 940nm, with a typical operating current of 70mA and typical operating voltage of 2.0V. The device is suitable for compact near-infrared optical modules requiring stable CW output and integrated power monitoring.
- Description
Description
940nm 50mW Laser Diode Overview
The 940nm 50mW Laser Diode is designed for continuous-wave operation in a compact TO-18 (5.6mm) package. It provides a rated optical output power of 50mW CW and a typical lasing wavelength of 940nm, making it suitable for compact near-infrared optical systems.
An integrated PIN monitor photodiode enables optical-output monitoring within the same TO-can package. This integrated monitoring function supports laser-power control and system-level feedback in optical modules where stable output performance is required.
Key Features
- 940nm typical lasing wavelength
- 50mW continuous-wave optical output
- Integrated PIN monitor photodiode
- Compact TO-18 package
- 5.6mm package diameter
- Typical threshold current: 20mA
- Typical operating current: 70mA
- Typical operating voltage: 2.0V
- Typical slope efficiency: 1.0mW/mA
- Suitable for continuous-wave near-infrared optical systems
Product Specifications
| Parameter | Specification |
|---|---|
| Product Type | 940nm CW Laser Diode |
| Typical Wavelength | 940 nm |
| Wavelength Range | 920–950 nm |
| Rated Optical Output | 50 mW CW |
| Package | TO-18, Ø5.6 mm |
| Monitor Photodiode | Integrated PIN PD |
| Typical Threshold Current | 20 mA |
| Typical Operating Current | 70 mA |
| Typical Operating Voltage | 2.0 V |
| Typical Monitor Current | 1.0 mA |
| Typical Slope Efficiency | 1.0 mW/mA |
Electro-Optical Characteristics
The following electro-optical characteristics are specified at a case temperature of Tc = 25°C. Parameters measured at the rated optical output are based on Po = 50mW.
| Parameter | Symbol | Test Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Threshold Current | Ith | — | — | 20 | 30 | mA |
| Operating Current | Iop | Po = 50mW | — | 70 | 80 | mA |
| Operating Voltage | Vop | Po = 50mW | — | 2.0 | 2.2 | V |
| Slope Efficiency | η | — | 0.8 | 1.0 | — | mW/mA |
| Monitor Current | Im | Po = 50mW | — | 1.0 | — | mA |
| Beam Divergence – Parallel | θ∥ | Po = 50mW, FWHM | 6 | 8 | 10 | deg |
| Beam Divergence – Perpendicular | θ⊥ | Po = 50mW, FWHM | 30 | 35 | 40 | deg |
| Parallel Deviation Angle | △θ∥ | Po = 50mW | -3 | — | 3 | deg |
| Perpendicular Deviation Angle | △θ⊥ | Po = 50mW | -3 | — | 3 | deg |
| Emission Point Accuracy | △X, △Y, △Z | Po = 50mW | -80 | — | 80 | µm |
| Lasing Wavelength | λp | Po = 50mW | 920 | 940 | 950 | nm |
940nm CW Optical Output
The laser delivers a rated 50mW continuous-wave optical output with a typical lasing wavelength of 940nm. The specified lasing wavelength range is 920–950nm at the rated operating condition.
Integrated PIN Monitor Photodiode
The integrated PIN monitor photodiode provides an internal optical-power monitoring function within the TO-18 package. The typical monitor current is 1.0mA at Po = 50mW, supporting feedback and optical-output control in laser-driver and optical-module designs.
Monitor current can be sorted according to project requirements, allowing system designers to select devices according to the desired monitoring characteristics.
Electrical Performance
The device operates with a typical current of 70mA and a typical voltage of 2.0V at the rated 50mW optical output. The maximum operating current is 80mA under the specified electro-optical conditions.
The threshold current is typically 20mA and specified up to 30mA. Typical slope efficiency is 1.0mW/mA.
Beam Characteristics
The beam divergence is specified at full width at half maximum (FWHM). Typical divergence is 8° in the parallel direction and 35° in the perpendicular direction.
| Beam Parameter | Min. | Typ. | Max. |
|---|---|---|---|
| Parallel Divergence θ∥ | 6° | 8° | 10° |
| Perpendicular Divergence θ⊥ | 30° | 35° | 40° |
| Parallel Deviation △θ∥ | -3° | — | 3° |
| Perpendicular Deviation △θ⊥ | -3° | — | 3° |
Typical PIV Characteristics
The PIV characteristic curve illustrates the relationship between operating current, optical output power and operating voltage. The curve supports system design and laser-driver evaluation across the device operating range.
Absolute Maximum Ratings
| Parameter | Symbol | Rating | Unit |
|---|---|---|---|
| Optical Output (CW) | Po | 55 | mW |
| Laser Reverse Voltage | Vr | 2 | V |
| PIN PD Reverse Voltage | Vr (PIN) | 30 | V |
| Operating Temperature | Top | -10 to +50 | °C |
| Storage Temperature | Tstg | -40 to +80 | °C |
TO-18 5.6mm Package
The laser diode is supplied in a compact TO-18 package with a nominal 5.6mm diameter. The metal-can package provides a standardized mechanical format for integration into laser modules, optical assemblies and OEM equipment.
Pin Connection
The three-pin configuration integrates both the laser diode and PIN monitor photodiode within the same package. The case is used as the common electrical connection shown in the pin diagram.
Typical Applications
- Near-infrared optical modules
- Optical sensing systems
- Measurement equipment
- Industrial optical instruments
- Laser modules requiring integrated optical-power monitoring
- OEM near-infrared photonics systems
OEM Integration Support
We support 940nm laser diode projects requiring compact TO-can packaging and integrated optical-output monitoring. Device selection and module integration can be evaluated according to optical power, monitoring requirements, operating conditions and mechanical design.
For OEM projects, please provide the required wavelength, optical output power, monitor-current requirements, package configuration, operating environment, sample quantity and estimated annual demand.
Request a Quote
Contact LumiLaserChip for pricing, samples, lead time and technical support for the 940nm 50mW Laser Diode with integrated PIN monitor photodiode in TO-18 package. Our team can support product selection and integration for near-infrared optical modules and sensing systems.
