840nm Fiber Coupled SLD Broadband Light Source

Product Overview-840nm Fiber Coupled SLD Broadband Light Source

Box Optronics manufactures the 840nm Fiber Coupled SLD Broadband Light Source, a high-performance active optical component based on amplified spontaneous emission (ASE) from a semiconductor optical amplifier structure, providing high optical power with a broad spectral bandwidth and low temporal coherence.

It delivers higher output power than LEDs while maintaining a much wider spectrum than laser diodes, making it suitable for applications requiring low coherence and high brightness.

Featuring 5mW minimum output power, 10nm typical 3dB bandwidth, and excellent power stability (≤±0.02dB short-term, ≤±0.05dB long-term), this 840nm SLD source is optimized for precision fiber optic sensing and imaging systems. The device is available in both compact module form (70×90×18mm) for system integration and benchtop form (195×220×120mm) for laboratory and testing environments.

Equipped with 780-HP fiber pigtails and FC/APC connectors as standard, with optional RS485 communication interface for monitoring and control, this SLD light source offers versatility and reliability for a wide range of applications.

Key Features-840nm Fiber Coupled SLD Broadband Light Source

● High output power: 5mW minimum

● Broad spectral bandwidth: 10nm typical (-3dB)

● Low spectral ripple for clean spectrum

● Gaussian spectrum profile

● Excellent power stability: ≤±0.02dB/15min short-term

● Long-term stability: ≤±0.05dB/8 hours

● Fiber coupled output with 780-HP fiber

● FC/APC connector standard, other options available

● Two form factors: Module and Benchtop

● RS485 communication interface for monitoring

● Low-cost solution compared

● Wide operating temperature range: -5°C to +55°C

● Compact and robust package design

● Optional benchtop version with touch screen control

Typical Applications-840nm Fiber Coupled SLD Broadband Light Source

● Fiber optic gyroscopes (FOG)

● Optical coherence tomography (OCT) systems

● Medical imaging and biomedical optics

● Fiber optic sensing systems

● White light interferometry

● Optical component testing and characterization

● Research and development laboratories

● Optical coherence domain reflectometry (OCDR)

Technical Specifications-840nm Fiber Coupled SLD Broadband Light Source

Optical Specifications (T=25°C)

Mechanical and Environmental Specifications

Product Details-840nm Fiber Coupled SLD Broadband Light Source

What is an SLD?

A Superluminescent Diode (SLD) is a semiconductor broadband optical source based on amplified spontaneous emission (ASE) with high optical gain in a laser-diode-like waveguide structure, operating under suppressed optical feedback conditions to prevent laser oscillation.

Unlike laser diodes that rely on a resonant cavity, SLDs employ low-reflectivity (AR-coated) facets and angled or tilted waveguide structures to suppress cavity feedback, enabling high optical gain while avoiding lasing action.

Key characteristics of SLDs:

• Significantly higher output power and brightness than LEDs, while maintaining low temporal coherence

• Broadband emission with a smooth ASE spectral envelope

• Very low temporal coherence (short coherence length), ideal for interferometric applications such as OCT

• Typically single transverse-mode waveguide structure enabling efficient single-mode fiber coupling

• Spectral shape typically engineered as quasi-Gaussian or customized flat-top profiles depending on design

Package Dimensions

The 840nm SLD broadband light source is available in two package configurations:

Module Version (70×90×18mm):

• Compact, low-profile design for system integration

• 4-M3.5 mounting holes for secure installation

• DC power input (5V or 12V)

• RS485 communication port (DB9 female)

• Fiber pigtail output with FC/APC connector

• Ideal for embedding into instruments and systems

Benchtop Version (195×220×120mm):

• Tabletop form factor for laboratory use

• Built-in touch screen display for status monitoring

• AC power input (110-240V universal)

• RS485 communication port (DB9 female)

• Fiber output on front panel

• Easy to use, plug-and-play operation

• Ideal for R&D labs and testing environments

Control and Monitoring

Both module and benchtop versions support RS485 communication interface for monitoring and control. The benchtop version additionally features a built-in touch screen for local operation.

Available monitoring and control parameters:

• Output power monitoring

• Drive current monitoring

• Temperature monitoring

• Power adjustment (optional)

• Host computer software for PC control (optional)

Why Choose Box Optronics?

• Strict quality control with 100% testing before shipment

• Competitive pricing with stable bulk delivery capability

• Flexible customization options for wavelength, power, bandwidth, fiber, and connectors

• 7×24 hours technical support and fast response

• Global shipping with DHL, UPS, and FedEx express delivery

• Both module and benchtop versions available

• Optional host software for system integration

• Reliable long-term supply for production quantities

Spectral Performance-840nm Fiber Coupled SLD Broadband Light Source

The typical spectrum showsacenter wavelength around 840nm with approximately 10nm -3dB bandwidth.

*Note: Spectrum shown is typical performance. Actual spectrum may vary slightly from unit to unit. Contact us for specific spectrum data or custom spectrum requirements.

Ordering Information-840nm Fiber Coupled SLD Broadband Light Source

Model Nomenclature

BSLD - XXX - XX - XX - X - (X)

Example: BSLD - 840 - 51 - SM - M

840nm SLD Broadband Light Source, 5mW output, 10nm bandwidth, 780-HP fiber, Module version, 5VDC power supply

Available Customization Options

• Center wavelength: 840nm standard, other wavelengths available upon request

• Output power: 5mW standard, higher power options available

• Spectral bandwidth: 10nm standard, other bandwidth options available

• Fiber type: 780-HP standard, other specialty fibers available

• Fiber length: 0.5m, 1m, 1.5m, 2m (custom lengths available)

• Pigtail type: 900μm loose tube,3.0mm loose tube

• Connector type: FC/APC standard, FC/UPC, SC/APC, LC/APC, or custom

• Package type: Module or Benchtop

• Power supply voltage: 5VDC, 12VDC (module), 110-240VAC (benchtop)

• Optical isolator: Built-in isolator option available

• Communication interface: RS485 standard, other interfaces available

• Host computer software: Available for monitoring and control

For custom requirements, please contact our sales team with your specifications.

Datasheet and Test Report

Each 840nm SLD broadband light source is shipped with a comprehensive test report documenting measured performance parameters. The datasheet PDF file contains detailed specifications, performance curves, and dimensional drawings.

• Individual test report included with each unit

• Traceable serial number for each unit

Datasheet

Terms of Quote and Payment

Quote Terms

• EXW (Ex Works): Recommended if you have a DHL/UPS/FedEx account. We ship using your account; no shipping cost is charged by us.

• DAP (Delivered at Place): If you don't have a courier account, we can arrange shipping with prepaid freight.

• Other terms: Please contact us to discuss.

Payment Terms

• PayPal: Fast and secure payment for samples and small orders

• T/T (Bank Transfer): Standard payment method for normal production orders

• Alibaba Trade Assurance: Secure order protection for online transactions with buyer guarantee

• Credit Card: Accepted through PayPal, Alibaba

• Flexible Payment Terms: Negotiable

Lead Time

• Standard production: ~10-15 working days

• Custom configurations: 15-20 working days

• Volume orders: Please contact for production schedule

• International shipping: ~3-5 working days (DHL/UPS/FedEx express)

• Expedited service: Available upon request

Operation Notes and Handling

Fiber Handling

• Avoid sharp bends or kinks that may damage the fiber

• Do not pull or twist the fiber pigtails

• Clean fiber connectors before connection using proper cleaning tools

• Always use dust caps when the connector is not in use

• Inspect fiber end-face for damage before use

Power and Operation Considerations

• Ensure proper power supply voltage before connecting

• Do not exceed maximum drive current or power ratings

• Use proper heat sinking for continuous operation

• Turn off power before connecting/disconnecting fiber

• Do not look directly into the fiber output when powered on