Laser-Pumped Phosphor Broadband Light Source

-10 dB Wavelength Range: 490 to 625 nm
Open-Loop, Closed-Loop, and External Trigger Modes
Long 10 000 Hour Lifespan
SMA905 Fiber-Coupled Output

M112L01

Ø200 µm, 0.22 NA,
MM Fiber Patch Cable

SLS701

Laser-Pumped Phosphor Light Source
(Fiber Patch Cable Sold Separately)

The settings and controls on the front panel are also accessible remotely via the software GUI.

U.S. Patent
10,317,046

Related Items

Fiber-Coupled LEDs

Solis® LEDs for Microscopy

Lamp-Based Light Sources

Spectral Filters

MIR Supercontinuum Source

Optical Spectrum Analyzers

Spectrometers

Chrolis™ 6-Wavelength LED Source

Cuvette Holder

Please Wait

Overview
Specs
Software
Feedback

Click to Enlarge
The side panel features a filter holder for a Ø1" or Ø25 mm spectral filter with a maximum thickness of 6.5 mm.

Click to Enlarge
Click Here for Raw Data
The measured spectral power distribution for the SLS701 Light Source. The blue-shaded region indicates the lamp's -10 dB power operating wavelength range.

Features

Laser-Pumped Phosphor Emission Over 490 - 625 nm Wavelength Range
25 mW Output (Open-Loop Mode)
0.03% Per Hour and <0.1% Per °C Output Power Drift (Closed-Loop Mode)
Accepts In-Line Ø1" or Ø25 mm Spectral Filter
SMA905 Fiber-Coupled Output (Fiber Patch Cable Sold Separately)
Location-Specific Power Cord Included

Thorlabs' SLS701 Laser-Pumped Phosphor Light Source (U.S. Patent 10,317,046) provides stable illumination from 490 nm to 625 nm. The internal 445 nm pump laser is focused into a very small spot on a single-crystal phosphor, generating incoherent, broadband emission with a small etendue. This results in laser-level, high-radiance output at the fiber connector. A photodiode measures off-axis emission to create a feedback loop for closed-loop operation and increased power stability over time and temperature changes. The emitted light is coupled into an SMA905 bulkhead for connecting to a fiber patch cable. Refer to the diagram below for additional details. A patch cable is not included; recommended cables are available for purchase below.

The front panel controls and LCD screen offer full control of the source power, light intensity, open- and closed-loop operation modes, and enabling or disabling external trigger inputs. The back panel features BNC connectors for external triggering and power modulation inputs, as well as a monitor output and USB port. The software GUI available for download on the Software tab offers full remote control mirroring the functionality available on the front panel. Command line operation is also available using USB connectivity and a terminal emulator or a user-created program.

The right side panel features a filter tray for Ø1" or Ø25 mm spectral filters selected by the user, as shown in the photo to the upper right. This optional filter is located in the beam path just before the fiber coupling lens, as illustrated in the diagram below.

Laser-Pumped Phosphor Source Architecture

Click for Details
Architecture of the SLS701 Laser-Pumped Phosphor Light Source

Key Specifications^a
Wavelength Range	FWHM: 495 - 575 nm -10 dB Power: 490 - 625 nm
Maximum Brightness	>7 W/mm²/sr (50 µm, 0.22 NA Fiber)^b
Output Power	25 mW (Open Loop)^c
Modulation Bandwidth	160 kHz (Open Loop) 2 kHz (Closed Loop)
Thermal Drift	<0.1%/°C (Closed Loop)
Drift/Hour	0.03% (Closed Loop)
Device Lifetime	10 000 Hours^d

Refer to the Specs tab for Complete Specifications
Calculated value based on power measurement with M14L01 multimode fiber patch cable.
Typical level at beginning of lifetime; measured with M112L01 multimode fiber patch cable.
Up to 50% power drop from initial value.

Item #	SLS701
Wavelength Range	FWHM: 495 - 575 nm -10 dB Power: 490 - 625 nm
Output Coupling	Fiber Coupled, SMA905 Connector
Maximum Brightness	>7 W/mm²/sr (50 µm, 0.22 NA Fiber)^a
Output Power	25 mW (Open Loop)^b
Modulation Bandwidth	160 kHz (Open Loop) 2 kHz (Closed Loop)
Output Non-Linearity	<2%
Stability	0.05% (Closed Loop)
Thermal Drift	<0.1%/°C (Closed Loop)
Drift/Hour	0.03% (Closed Loop)
Device Lifetime	10 000 Hours^c
Power Supply Voltage	100 - 240 VAC, 50 - 60 Hz
Operating Temperature Range	0 to 35 °C
Storage Temperature Range	-15 to 65 °C
Dimensions (L x W x H)	346.9 mm x 289.4 mm x 150.0 mm (13.66" x 11.39" x 5.91")
Mass (Weight)	5.6 kg (12.3 lbs)

Calculated value based on power measurement with M14L01 multimode fiber patch cable.
Typical level at beginning of lifetime; measured with M112L01 multimode fiber patch cable.
Up to 50% power drop from initial value.

Click to Enlarge
SLS701 Back Panel

Click to Enlarge
SLS701 Front Panel

Front Panel		Back Panel
Callout	Description	Callout	Description
F1	Operation Mode Switch	B1	BNC Port for External Triggering: 5 V CMOS
F2	Output Power Adjustment Knob	B2	BNC Port for Modulation Input: 0 to 5 V
F3	External Port Mode Switch	B3	BNC Port for Monitor Out: 0 to 5 V
F4	Light On/Off Button	B4	USB Type-B Port
F5	Light On/Off State LED	B5	Main Cooling Fan
F6	SMA Fiber Port	B6	AC Power Cord Connector
F7	Power Button with LED Indicator	B7	Fuse Drawer

Recommended System Requirements
Operating System	Windows^® 7 SP1 (32-Bit, 64-Bit) with KB3020369 and KB3125574; Windows 10 (32-Bit, 64-Bit); Windows 11 (64-Bit)
Processor (CPU)	1 GHz or Higher
Memory (RAM)	2 GB
Hard Drive	25 MB (Min) of Available Disk Space
Interface	Free USB 2.0 Port

Software

Version 1.1.1

This software package provides a GUI to control the SLS701 Light Source. To download, click the button below.

SLS701 GUI Software

The SLS701 GUI Software provides full control over the SLS701 Laser-Pumped Light Source, allowing the user to power the source on and off, adjust the intensity, toggle the operation mode between open and closed loop, and activate/deactivate the ports on the rear panel.

Posted Comments:
No Comments Posted

Laser-Pumped Phosphor Broadband Light Source

Zoom

445 nm Fiber-Laser-Pumped Phosphor Light Source
490 - 625 nm Wavelength Range (-10 dB Power)
Open-Loop, Closed-Loop, and External Trigger Modes
Front Panel, Software GUI, or Command Line Operation

The SLS701 Laser-Pumped Phosphor Light Source outputs fiber-coupled light from 490 nm to 625 nm (-10 dB power). The source can be fully operated using the front panel LCD and controls or remotely via the USB connector on the rear. Remote control can be performed using a PC with the software GUI or via a command line interface. External triggering, modulation input, and monitor output are available on the rear panel. A fiber patch cable is not included; a variety of recommended compatible cables are available below.

Recommended Fiber Patch Cables

Zoom

Recommended Fiber Patch Cables
Item #	NA	Core Size	Output Power^a	Fiber Type
M14L01	0.22	Ø50 µm	2.5 mW	Low OH MM Fiber
M112L01	0.22	Ø200 µm	25 mW	Solarization-Resistant MM Fiber
M113L01	0.22	Ø400 µm	33 mW	Solarization-Resistant MM Fiber
M38L01	0.39	Ø200 µm	60 mW	Low OH MM Fiber
M28L01	0.39	Ø400 µm	107 mW	Low OH MM Fiber

Typical value at beginning of lifetime.

The SLS701 light source does not include a fiber patch cable, but it is aligned and optimized for use with an M112L01 fiber patch cable. The M112L01 is a solarization-resistant multimode fiber patch cable that has SMA connectors, a Ø200 µm core, and 0.22 NA. Other fiber patch cables with SMA connectors can also be used with the SLS701 light source, but output power may vary. The table to the right provides the typical output powers for the source when used with a variety of different fiber patch cables.