LDX-IR-FS

Free-Space Near-Infrared Multimode Laser Diodes, 750–1400nm, up to 16W

Key Features:

750–1400nm near-infrared wavelength range
Up to 16W output power, depending on wavelength
Broad selection including 808, 915, 940, 980 & 1064nm
Multiple emitter sizes and package formats
FAC, TEC, photodiode, thermistor & isolation options
Standard, configurable & custom LDX solutions

Need help configuring an LDX-IR-FS diode? Share your target wavelength, output power, emitter size, package preference, beam requirements, thermal-control needs, and production quantity.

RPMC can help determine whether a standard configuration, modified package, or custom LDX solution is the right starting point.

LDX-IR-FS: Free Space Infrared Multimode Laser Diode

POPULAR CONFIGURATIONS:

Part Number	Part Description
LDX-3105-750	Laser Diode, Multimode, 750+/-5 nm, 1200mW, 50um emitter	Get Quote
LDX-3110-750	Laser Diode, Multimode, 750+/-5 nm, 1500mW, 100um emitter	Get Quote
LDX-3210-750	Laser Diode, Multimode, 750+/-5 nm, 2000mW, 100um emitter	Get Quote
LDX-3315-750	Laser Diode, Multimode, 750+/-5 nm, 3000mW, 150um emitter	Get Quote
LDX-3530-750	Laser Diode, Multimode, 750+/-5 nm, 5000mW, 300um emitter	Get Quote
LDX-3105-760	Laser Diode, Multimode, 760+/-5 nm, 1200mW, 50um emitter	Get Quote
LDX-3210-760	Laser Diode, Multimode, 760+/-5 nm, 2000mW, 100um emitter	Get Quote
LDX-3315-760	Laser Diode, Multimode, 760+/-5 nm, 3000mW, 150um emitter	Get Quote
LDX-3420-760	Laser Diode, Multimode, 760+/-5 nm, 4000mW, 200um emitter	Get Quote
LDX-3630-760	Laser Diode, Multimode, 760+/-5 nm, 6000mW, 300um emitter	Get Quote
LDX-3315-775	Laser Diode, Multimode, 775+/-3 nm, 3000mW, 150um emitter	Get Quote
LDX-3105-780	Laser Diode, Multimode, 780+/-3 nm, 1200mW, 50um emitter	Get Quote
LDX-3310-780	Laser Diode, Multimode, 780+/-3 nm, 2500mW, 100um emitter	Get Quote
LDX-3315-780	Laser Diode, Multimode, 780+/-3 nm, 3500mW, 150um emitter	Get Quote
LDX-3520-780	Laser Diode, Multimode, 780+/-3 nm, 5000mW, 200um emitter	Get Quote
LDX-3315-785	Laser Diode, Multimode, 785+/-3 nm, 3500mW, 150um emitter	Get Quote
LDX-3520-785	Laser Diode, Multimode, 785+/-3 nm, 5000mW, 200um emitter	Get Quote
LDX-3105-792	Laser Diode, Multimode, 792+/-3 nm, 1200mW, 50um emitter	Get Quote
LDX-3310-792	Laser Diode, Multimode, 792+/-3 nm, 3000mW, 100um emitter	Get Quote
LDX-3415-792	Laser Diode, Multimode, 792+/-3 nm, 4000mW, 150um emitter	Get Quote
LDX-3820-792	Laser Diode, Multimode, 792+/-5 nm, 8000mW, 200um emitter	Get Quote
LDX-3310-797	Laser Diode, Multimode, 797+/-3 nm, 3000mW, 100um emitter	Get Quote
LDX-3415-797	Laser Diode, Multimode, 797+/-3 nm, 4000mW, 150um emitter	Get Quote
LDX-3520-797	Laser Diode, Multimode, 797+/-3 nm, 5000mW, 200um emitter	Get Quote
LDX-3105-808	Laser Diode, Multimode, 808+/-3 nm, 1200mW, 50um emitter	Get Quote
LDX-3210-808	Laser Diode, Multimode, 808+/-3 nm, 2000mW, 100um emitter	Get Quote
LDX-3310-808	Laser Diode, Multimode, 808+/-3 nm, 3000mW, 100um emitter	Get Quote
LDX-3410-808	Laser Diode, Multimode, 808+/-3 nm, 4000mW, 100um emitter	Get Quote
LDX-3415-808	Laser Diode, Multimode, 808+/-3 nm, 4000mW, 150um emitter	Get Quote
LDX-3610-808	Laser Diode, Multimode, 808+/-3 nm, 6000mW, 100um emitter	Get Quote
LDX-3620-808	Laser Diode, Multimode, 808+/-3 nm, 6000mW, 200um emitter	Get Quote
LDX-3A20-808	Laser Diode, Multimode, 808+/-5 nm, 10000mW, 200um emitter	Get Quote
LDX-3415-825	Laser Diode, Multimode, 825+/-5 nm, 4000mW, 150um emitter	Get Quote
LDX-3210-835	Laser Diode, Multimode, 835+/-5 nm, 2000mW, 100um emitter	Get Quote
LDX-3610-835	Laser Diode, Multimode, 835+/-5 nm, 6000mW, 100um emitter	Get Quote
LDX-3103-860	Laser Diode, Multimode, 860+/-10 nm, 1000mW, 30um emitter	Get Quote
LDX-3105-860	Laser Diode, Multimode, 860+/-10 nm, 1200mW, 50um emitter	Get Quote
LDX-3210-860	Laser Diode, Multimode, 860+/-10 nm, 2000mW, 100um emitter	Get Quote
LDX-3310-860	Laser Diode, Multimode, 860+/-10 nm, 2500mW, 100um emitter	Get Quote
LDX-3415-860	Laser Diode, Multimode, 860+/-10 nm, 3500mW, 150um emitter	Get Quote
LDX-3520-860	Laser Diode, Multimode, 860+/-10 nm, 5000mW, 200um emitter	Get Quote
LDX-3415-870	Laser Diode, Multimode, 870+/-5 nm, 4000mW, 150um emitter	Get Quote
LDX-3210-880	Laser Diode, Multimode, 880+/-10 nm, 2500mW, 100um emitter	Get Quote
LDX-3415-880	Laser Diode, Multimode, 880+/-10 nm, 4000mW, 150um emitter	Get Quote
LDX-3620-880	Laser Diode, Multimode, 880+/-10 nm, 6000mW, 200um emitter	Get Quote
LDX-3210-905	Laser Diode, Multimode, 905+/-5 nm, 2500mW, 100um emitter	Get Quote
LDX-3410-915	Laser Diode, Multimode, 915+/-10 nm, 4000mW, 100um emitter	Get Quote
LDX-3615-915	Laser Diode, Multimode, 915+/-10 nm, 6000mW, 150um emitter	Get Quote
LDX-3A10-915	Laser Diode, Multimode, 915+/-10 nm, 10000mW, 100um emitter	Get Quote
LDX-3410-940	Laser Diode, Multimode, 940+/-10 nm, 4000mW, 100um emitter	Get Quote
LDX-3615-940	Laser Diode, Multimode, 940+/-10 nm, 6000mW, 150um emitter	Get Quote
LDX-3810-940	Laser Diode, Multimode, 940+/-10 nm, 8000mW, 100um emitter	Get Quote
LDX-3F20-940	Laser Diode, Multimode, 940+/-10 nm, 16000mW, 200um emitter	Get Quote
LDX-3A10-960	Laser Diode, Multimode, 960+/-10 nm, 10000mW, 100um emitter	Get Quote
LDX-3105-980	Laser Diode, Multimode, 980+/-10 nm, 1500mW, 50um emitter	Get Quote
LDX-3410-980	Laser Diode, Multimode, 980+/-10 nm, 4000mW, 100um emitter	Get Quote
LDX-3615-980	Laser Diode, Multimode, 980+/-10 nm, 6000mW, 150um emitter	Get Quote
LDX-3A10-980	Laser Diode, Multimode, 980+/-10 nm, 10000mW, 100um emitter	Get Quote
LDX-3610-995	Laser Diode, Multimode, 995+/-5 nm, 6000mW, 100um emitter	Get Quote
LDX-3C20-1015	Laser Diode, Multimode, 1015+/-5 nm, 12000mW, 200um emitter	Get Quote
LDX-3310-1030	Laser Diode, Multimode, 1030+/-10 nm, 3000mW, 100um emitter	Get Quote
LDX-3520-1030	Laser Diode, Multimode, 1030+/-10 nm, 5000mW, 200um emitter	Get Quote
LDX-3C20-1030	Laser Diode, Multimode, 1030+/-5 nm, 12000mW, 200um emitter	Get Quote
LDX-3105-1064	Laser Diode, Multimode, 1064+/-10 nm, 1500mW, 50um emitter	Get Quote
LDX-3410-1064	Laser Diode, Multimode, 1064+/-10 nm, 4000mW, 100um emitter	Get Quote
LDX-3515-1064	Laser Diode, Multimode, 1064+/-10 nm, 5000mW, 150um emitter	Get Quote
LDX-3A10-1064	Laser Diode, Multimode, 1064+/-10 nm, 10000mW, 100um emitter	Get Quote
LDX-3C20-1064	Laser Diode, Multimode, 1064+/-5 nm, 12000mW, 200um emitter	Get Quote
LDX-3205-1130	Laser Diode, Multimode, 1130+/-20 nm, 2000mW, 50um emitter	Get Quote
LDX-3310-1130	Laser Diode, Multimode, 1130+/-20 nm, 3500mW, 100um emitter	Get Quote
LDX-3515-1130	Laser Diode, Multimode, 1130+/-20 nm, 5000mW, 150um emitter	Get Quote
LDX-3105-1210	Laser Diode, Multimode, 1210+/-20 nm, 1500mW, 50um emitter	Get Quote
LDX-3210-1210	Laser Diode, Multimode, 1210+/-20 nm, 2000mW, 100um emitter	Get Quote
LDX-3718-1280	Laser Diode, Multimode, 1280+/-20 nm, 7000mW, 180um emitter	Get Quote
LDX-3410-1310	Laser Diode, Multimode, 1310+/-20 nm, 4000mW, 100um emitter	Get Quote
LDX-3310-1370	Laser Diode, Multimode, 1370+/-20 nm, 3500mW, 100um emitter	Get Quote
LDX-3510-1370	Laser Diode, Multimode, 1370+/-20 nm, 5000mW, 100um emitter	Get Quote

SHOW MORE OPTIONS SHOW LESS OPTIONS

Overview:
Specifications:
Part No. Configurator:
Datasheets/Downloads:
Applications:
Videos:

About the LDX-IR-FS Free-Space Infrared Laser Diode Family

The LDX-IR-FS family includes high-power multimode near-infrared laser diodes for applications that require direct free-space output. Current standard configurations span 750–1400 nm, with output power up to 16 W depending on wavelength, emitter size, and package configuration.

The family includes many commonly used NIR wavelengths, including 808, 915, 940, 980, and 1064 nm, along with additional wavelengths extending through 1370 nm in the current standard portfolio. Start with the required wavelength and optical power, then consider emitter size, package format, beam conditioning, thermal management, monitoring, and mechanical integration.

When Should I Choose the Free-Space Version?

Start with LDX-IR-FS when your optical system needs direct access to the diode output for external collimation, focusing, beam shaping, pumping, illumination, or integration into a free-space optical path.

If the application instead benefits from flexible fiber delivery or locating the optical output remotely from the diode package, compare the LDX-IR-FC fiber-coupled infrared laser diode family.

Configure an LDX-IR-FS Part Number

Use the configurator below to narrow the available wavelength, laser chip, package, and package-option combinations. The resulting part number can be referenced when requesting a quote.

Reference the configured part number in your quote request so RPMC can quickly identify the intended configuration.

Package & Beam-Conditioning Options

The selected diode chip is only part of the configuration. Package format affects mounting, thermal management, environmental protection, monitoring, and how the beam is integrated into the optical system.

If the configurator or popular configurations do not show an exact match, send RPMC the wavelength, power, emitter, package, optical, and environmental requirements you already know. We can help determine whether another standard configuration or a more customized LDX diode is appropriate.

Package Types

Click a package image to view its available technical drawing.

C-Mount Package	B-Mount Package	Chip-on-Submount

Industry-standard package Small footprint with screw mounting Material – Copper (OFHC) Fast-axis lensing optional	Industry-standard package Very small footprint Requires soldering to heatsink Material – Copper Tungsten (CuW) Fast-axis lensing optional	Industry-standard package Very small footprint Requires soldering to heatsink Material – BeO Fast-axis lensing optional
9mm Package	TO-3 Package	HHL Package

Industry-standard package Hermetically sealed windowed package Header material – Copper Internal photodiode optional Isolated package optional Fast-axis lensing optional	Hermetically sealed windowed package Mounting to heatsink with screws Internal peltier cooler (TEC) Internal thermistor and photodiode optional Header material – Copper Fast-axis lensing optional	Hermetically sealed windowed package Mounting to heatsink with screws Internal peltier cooler (TEC) Internal thermistor and photodiode Header material – Copper Fast-axis lensing optional

Fast-Axis Collimation (FAC) Options

Fast-axis collimation can be added when the raw diode divergence does not match the downstream optical system. LDX offers two standard FAC approaches, with tailored collimation available when the application requires a different beam condition.

L1	Best Collimation FAC Lens	Less than 1° divergence in the fast axis direction.
L2	Squared Beam FAC Lens	Matches the fast-axis to the slow-axis divergence.

Why Choose LDX for a Free-Space Infrared Laser Diode?

Broad NIR wavelength selection: standard configurations cover many commonly required wavelengths from 750–1400 nm, including 808, 915, 940, 980, 1064, and longer-wavelength NIR options.
Higher-power configurations: selected wavelengths are available at substantially higher output powers than the visible family, reaching up to 16 W depending on wavelength and emitter configuration.
Multiple emitter and package choices: output power, emitter size, footprint, mounting, thermal management, and environmental protection can be balanced around the optical system.
Beam-conditioning flexibility: standard and tailored fast-axis collimation can help adapt the raw diode output to pumping, illumination, focusing, or other downstream optics.
Configuration beyond the standard catalog: custom wavelength, emitter, output-power, chip, package, optical, thermal-control, and related requirements can be evaluated when a standard part does not fit.
US-based manufacturing and device characterization: LDX manufactures, packages, burns in, and individually characterizes its multimode laser diodes at its Tennessee facility.

Need Help Finalizing an LDX-IR-FS Configuration?

Send RPMC the wavelength, output power, emitter size, package, beam-conditioning, thermal, environmental, and quantity requirements you already know. We can help determine which standard or custom LDX infrared configuration is the best starting point.

View All LDX Optronics Laser Diode Families

Wavelength (nm)	750, 780, 797, 808, 830, 860, 915, 940, 980, 1064, 1130, 1210, 1280, 1370
Description	Laser Diode, Multimode, Free-Space, Near-Infrared, 750–1400nm, up to 16W
Type	Single Emitter, Made in the USA, Customizable

LDX-Catalog-2026

LDX-Tech-Notes-2026

How can we help you?

Talk to one of our experienced product managers today!

Customers also bought

LDX-IR-FC: Fiber-Coupled Infrared Multimode Laser Diode
Fiber-Coupled Near-Infrared Multimode Laser Diodes, 750–1400nm, up to 12.8W

LDX-SWIR-FS: Free Space Short-Wave Infrared Multimode Laser Diode
Free-Space SWIR Multimode Laser Diodes, 1400–1900nm, up to 7W

LDX-VIS-FS: Free Space Visible Multimode Laser Diode
Free-Space Visible Multimode Laser Diodes, 405–750nm, up to 5W

Laser Diode Blog Posts

Components White Papers

Component FAQs

Can I operate multiple laser diodes from the same power supply?

Can I operate multiple laser diodes from the same power supply?

The same power supply can drive multiple laser diodes if they are connected in series, but they must never be connected in parallel. When two diodes are connected in series, they will function properly as long as the compliance voltage is large enough to cover the voltage drop across each diode. For example, suppose you are trying to power two diode lasers, each with an operating voltage of 1.9 V, and connect the two in series. In that case, the pulsed or CW laser driver must have a total voltage capacity greater than 3.8 V. This configuration works because diodes share the same current when connected in series. In contrast, when two diodes are connected in parallel, the current is no longer shared between the two diodes. Get more details on the topic in this article: “Can I Operate Multiple Laser Diodes From the Same Power Supply?” Get more information from our Lasers 101, Blogs, Whitepapers, FAQs, and Press Release pages in our Knowledge Center!

Can laser diodes emit green, blue, or UV light?

Can laser diodes emit green, blue, or UV light?

The output wavelength of a semiconductor laser is based on the difference in energy between the valance and conduction bands of the material (bandgap energy). Since the energy of a photon is inversely proportional to its wavelength, this means that a larger bandgap energy will result in a shorter emission wavelength. Due to the relatively wide bandgap energy of 3.4 eV, gallium nitride (GaN) is ideal for the production of semiconductor optoelectronic devices, producing blue wavelength light without the need for nonlinear crystal harmonic generation. Since the mid-’90s, GaN substrates have been the common material utilized for blue LEDs. In recent years, GaN based laser technology has provided blue, green and UV laser diodes, now available in wavelengths from 375 nm to 521 nm, with output powers exceeding 100 watts. Read our article, titled “Gallium Nitride (GaN) Laser Diodes: Green, Blue, and UV Wavelengths” to learn more about GaN Based Laser Diodes, available through RPMC. Get more information from our Lasers 101, Blogs, Whitepapers, and FAQs pages in our Knowledge Center!

How long will a laser diode last?

How long will a laser diode last?

Honestly, it depends on several factors, and there is no simple chart to cover everything. Typical diode lifetimes are in the range of 25,000 to 50,000 hours. Though, there are lifetime ratings outside this range, depending on the configuration. Furthermore, there are a wide range of degradation sources that contribute to a shorter lifespan of laser diodes. These degradation sources include dislocations that affect the inner region, metal diffusion and alloy reactions that affect the electrode, solder instability (reaction and migration) that affect the bonding parts, separation of metals in the heatsink bond, and defects in buried heterostructure devices. Read more about diode lifetime and contributing factors in this article: “Understanding Laser Diode Lifetime.” Get more information from our Lasers 101, Blogs, Whitepapers, FAQs, and Press Release pages in our Knowledge Center!

What factors affect the lifetime of laser diodes?

What factors affect the lifetime of laser diodes?

There are a great many factors that can increase or decrease the lifetime of a laser diode. One of the main considerations is thermal management. Mounting or heatsinking of the package is of tremendous importance because operating temperature strongly influences lifetime and performance. Other factors to consider include electrostatic discharge (ESD), voltage and current spikes, back reflections, flammable materials, noxious substances, outgassing materials (even thermal compounds), electrical connections, soldering method and fumes, and environmental considerations including ambient temperature, and contamination from humidity and dust. Read more about these critical considerations and contributing factors in this article: “How to Improve Laser Diode Lifetime: Advice and Precautions on Mounting.” Get more information from our Lasers 101, Blogs, Whitepapers, FAQs, and Press Release pages in our Knowledge Center!

What is a laser diode?

What is a laser diode?

A Laser Diode or semiconductor laser is the simplest form of Solid-State Laser. Laser diodes are commonly referred to as edge emitting laser diodes because the laser light is emitted from the edge of the substrate. The light emitting region of the laser diode is commonly called the emitter. The emitter size and the number of emitters determine output power and beam quality of a laser diode. Electrically speaking, a laser diode is a PIN diode. The intrinsic (I) region is the active region of the laser diode. The N and P regions provide the active region with the carriers (electrons and holes). Initially, research on laser diodes was carried out using P-N diodes. However, all modern laser diodes utilize the double-hetero-structure implementation. This design confines the carriers and photons, allowing a maximization of recombination and light generation. If you want to start reading more about laser diodes, try this whitepaper “How to Improve Laser Diode Lifetime.” If you want to read more about the Laser Diode Types we offer, check out the Overview of Laser Diodes section on our Lasers 101 Page!

What is the difference between laser diodes and VCSELs?

What is the difference between laser diodes and VCSELs?

Laser Diodes and VCSELs are semiconductor lasers, the simplest form of Solid State Lasers. Laser diodes are commonly referred to as edge emitting laser diodes because the laser light is emitted from the edge of the substrate. The light emitting region of the laser diode is commonly called the emitter. The emitter size and the quantity of emitters determine output power and beam quality of a laser diode. These Fabry Perot Diode Lasers with a single emission region (Emitter) are typically called laser diode chips, while a linear array of emitters is called laser diode bars. Laser diode bars typically use multimode emitters, the number of emitters per substrate can vary from 5 emitters to 100 emitters. VCSELs (Vertical Cavity Surface Emitting Laser) emit light perpendicular to the mounting surface as opposed to parallel like edge emitting laser diodes. VCSELs offer a uniform spatial illumination in a circular illumination pattern with low speckle. If you want to read more about lasers in general, and help narrowing down the selection to find the right laser for you, check out our Knowledge Center for our Blogs, Whitepapers, and FAQ pages, as well as our Lasers 101 Page! VCSEL

What’s the difference between single transverse mode & single longitudinal mode?

What’s the difference between single transverse mode & single longitudinal mode?

Within the laser community, one of the most overused and often miscommunicated terms is the phrase “single mode.” This is because a laser beam when traveling through air takes up a three-dimensional volume in space similar to that of a cylinder; and just as with a cylinder, a laser beam can be divided into independent coordinates each with their own mode structure. For a cylinder we would call these the length and the cross-section, but as shown in the figure below for a laser beam, we define these as the transverse electromagnetic (TEM) plane and the longitudinal axis. Both sets of modes are fundamental to the laser beam’s properties, since the TEM modes determine the spatial distribution of the laser beams intensity, and the longitudinal modes determine the spectral properties of the laser. As a result, when a laser is described as being “single-mode” first you need to make sure that you truly understand which mode is being referred to. Meaning that you must know if the laser is single transverse mode, single longitudinal mode, or both. Get all the information you need in this article: “What is Single Longitudinal Mode?” Get more information from our Lasers 101, Blogs, Whitepapers, FAQs, and Press Release pages in our Knowledge Center!