850nm
850nm 20mW 2835 VCSEL SMD
850nm 20mW 2835 VCSEL SMD with 23mW typical output at 28mA, 21° D86 divergence and SMT packaging for stronger pulsed NIR sources.
Specifications
- Product Type
- VCSEL SMD
- Wavelength
- 850nm typ.; 840–860nm
- Optical Output Power
- 20mW min. / 23mW typ.
- Transverse Mode
- Multi-mode VCSEL
- Operating Mode
- QCW / Pulse
- Beam Divergence
- 21° typ., D86
- SMD Package Options
- 2835
1. 850nm 20mW 2835 VCSEL SMD for Higher Pulsed NIR Output
The 850nm 20mW 2835 VCSEL SMD is the highest-output product in the current 850nm 2835 surface-mount VCSEL range.
At a forward current of 28mA, it provides 20mW minimum and 23mW typical optical output under a 0.5ms pulse width and 10% duty cycle.
The device uses a compact 2835 SMD package containing a 7mil × 7mil VCSEL chip. It retains the same package footprint as the lower-power 5mW and 10mW products while providing stronger pulsed near-infrared output.
The typical D86 beam divergence is 21°.
Primary development directions include:
- Near-infrared optical detection
- Machine-vision source evaluation
- Proximity and presence detection
- Compact active NIR illumination
- PCB-mounted optical sources
- Engineering and research prototypes
The product is intended for controlled QCW or pulsed operation. Its 20mW and 23mW ratings must be interpreted together with the specified current, pulse width and duty cycle.
2. Optical and Electrical Characteristics
Parameter | Minimum | Typical | Maximum | Test Condition |
|---|---|---|---|---|
Peak Wavelength | 840nm | 850nm | 860nm | — |
Optical Output Power | 20mW | 23mW | — | IF = 28mA |
Threshold Current | — | 5.5mA | — | — |
Forward Voltage | — | 2.0V | — | IF = 28mA |
Series Resistance | — | 50Ω | — | — |
Slope Efficiency | — | 1W/A | — | — |
Wavelength Shift | — | 0.047nm/°C | — | — |
Beam Divergence, D86 | — | 21° | — | — |
The optical-output rating is specified under QCW operation with a 0.5ms pulse width and 10% duty cycle.
The device should not be interpreted as a continuous-wave 20mW source.
Increasing current, pulse width or duty cycle beyond the specified condition can increase junction temperature and may affect output power, wavelength, electrical performance and long-term reliability.
Beam divergence is specified using D86 and should not be interpreted as an FWHM measurement.
3. 2835 Package and PCB Integration
Package Parameter | Specification |
|---|---|
Package Type | 2835 SMD |
Package Length | 3.5mm |
Package Width | 2.8mm |
Package Height | Approximately 0.68mm |
Internal VCSEL Chip Size | 7mil × 7mil |
Pin 1 | Anode |
Pin 2 | Cathode |
Dimensional Tolerance | ±0.1mm unless otherwise specified |
Standard Reel Quantity | 4,000 pcs / reel |
The packaged device supports automated pick-and-place assembly and PCB-level reflow soldering.
PCB and driver design should consider:
- Correct package polarity
- Recommended solder-pad dimensions
- Controlled 28mA pulse-current delivery
- Current limiting
- Current overshoot protection
- Pulse-width and duty-cycle accuracy
- ESD protection
- Optical clearance
- External optical components
- PCB thermal structure
The top optical surface must not be pressed, scratched or contaminated during assembly.
The product is ESD-sensitive and requires suitable electrostatic protection during storage, placement, soldering, testing and module integration.
4. Application Development and Product Selection
The 20mW version is suitable when stronger pulsed output is required while retaining the compact 2835 package format.
It should be considered when:
- More optical output is required than the 5mW or 10mW versions provide
- The driver can supply a controlled 28mA pulse current
- A 0.5ms pulse width and 10% duty cycle are compatible with the system
- Compact PCB integration is required
- The receiver or optical path benefits from increased source output
Higher source power does not automatically guarantee a specific working distance or received signal. Final performance depends on detector sensitivity, optical losses, external optics, alignment and environmental conditions.
The 850nm 5mW 2835 VCSEL SMD supports lower-current operation, while the 850nm 10mW 2835 VCSEL SMD provides an intermediate output level.
Customers requiring alternative bare-die powers or custom packaging can review the 850nm VCSEL Bare Die Series.
5. Evaluation Kit and Documentation Support
The Evaluation Kit includes:
- 10 pcs / KIT
- One selected 850nm 20mW model per kit
- Corresponding product datasheet
- Corresponding package-dimension file
- International shipping quoted according to destination
The device can be evaluated for:
- PCB assembly
- Pulse-driver development
- Current and overshoot control
- Optical-output testing
- External lens evaluation
- Detector integration
- Initial optical-module development
The following requirements can also be discussed:
- Optical-output binning
- Pulse width and duty cycle
- PCB pad integration
- Alternative SMD packaging
- External lens and diffuser integration
- Beam-shaping requirements
- Custom optical modules
- Volume-supply planning
For component-level project evaluation, an Initial Product Report covering the Laser Diode Series and VCSEL Laser Diode Chip Series has been filed with the U.S. FDA CDRH. This filing supports technical documentation and product evaluation.
For applicable products, CE, EMC, EN 60825, LVD, RoHS, REACH and halogen-free certification and compliance documents are available.
Documentation depends on the corresponding product model and does not represent certification of the customer’s finished device.
6. Frequently Asked Questions
FAQ 1. What are the main specifications of the 850nm 20mW 2835 VCSEL SMD?
The device provides 20mW minimum and 23mW typical optical output at 28mA.
It is specified under a 0.5ms pulse width and 10% duty cycle and provides a typical D86 beam divergence of 21°.
The device uses a compact 2835 SMD package containing a 7mil × 7mil VCSEL chip.
FAQ 2. Can the 20mW VCSEL SMD operate continuously?
The product is specified for QCW or pulsed operation.
Its output rating is based on a 0.5ms pulse width and 10% duty cycle and should not be interpreted as a continuous-wave 20mW rating.
Continuous operation would require separate electrical, thermal and reliability validation.
FAQ 3. When should I choose the 20mW version instead of the 5mW or 10mW product?
The 20mW version is appropriate when the system requires the highest output available in the current 850nm 2835 SMD series.
It requires a controlled 28mA pulse current and uses a 10% duty-cycle test condition.
Final selection should consider detector sensitivity, optical losses, working distance, external optics and driver capability.