Marktech Expands Co‑Packaged 6‑Chip Multi‑Wavelength Product Portfolio with New Nine‑Wavelength COB Technology

Building on a Proven Multi‑Chip Platform

Marktech’s existing multi‑chip products combine several LED dies – from ultraviolet through mid‑wave infrared – into a single package. Each chip is individually addressable, allowing designers to select wavelengths from 235 nm to 4.3 µm in one device. By co‑packaging emitters and detectors, Marktech can provide complete transmitter–receiver assemblies that eliminate the need for discrete photodiodes and simplify system design of reflective analytical sensors. Packaging options include surface‑mount, TO‑can, transfer-molded, and the company’s ATLAS hermetic SMD package. In IR and UV applications, two photodiodes can be incorporated into the assembly, one for monitoring the output of the invisible LEDs and a second walled detector to measure the reflective absorption of a chemical analyte, biomarker, or material constituent.

The company also offers multi‑wavelength emitters without detectors, which offer several benefits over single‑chip LEDs and broad‑spectrum lamps. According to Marktech’s photonics engineers, multi‑LED sources eliminate monochromators and filter wheels in some cases, enabling higher power at selected wavelengths, faster response, and simplified optics. The high monochromaticity and the ability to select only the wavelengths that provide useful information improve the signal‑to‑noise ratio and detection speed. In applications such as fluorescence and colorimetry, selecting a handful of critical wavelengths reduces exposure, thermal damage, and photobleaching of samples.

New Nine‑Wavelength COB Product

Recognizing the demand for even higher channel counts in a compact form factor, Marktech has developed a nine‑wavelength chip‑on‑board (COB) emitter. In COB assemblies, multiple LED dies are mounted directly on a standard FR-4 PCB, allowing tighter packing and improved thermal management. Marktech notes that COB technology, common in illumination products, can dramatically enhance emission and detection functions in sensing applications. By combining nine wavelengths into a single board‑level module, the upcoming device will give designers a broad spectral palette while preserving size, weight and power (SWaP) advantages. The standard option assembly consists of 365nm, 470nm, 525nm, 570nm, 630nm, 780nm, 850nm, 940nm and 1200nm chips. 

A detailed datasheet for the new product is available here: MTSA-2595.

Integrated Detectors and Monitoring Photodiodes

All multi‑wavelength emitters can be supplied with integral photodiodes. Marktech’s silicon, SiC and InGaAs photodiodes may be added to the package to provide a monitoring function or to detect reflected or transmitted light. When UV, visible, or Infrared LEDs are used, the monitoring photodiode confirms that the LED is emitting. For some wearable biosensors or analytical instrument designs, two photodiodes can be incorporated into the assembly, one for monitoring the output of the invisible LEDs and a second walled detector to measure the reflected absorption or transmission through of a chemical analyte, biomarker, or material constituent.

For demanding applications, Marktech also offers co‑packaged multi‑wavelength emitters with InGaAs detectors. The recently introduced MTMD1479PD6T38 and MTMD34679PD6T38 combine three to five SWIR LED chips (e.g., 1300 nm through 1900 nm) with a 2.6‑µm InGaAs photodiode, providing 800–2600 nm responsivity. These devices demonstrate Marktech’s ability to integrate multiple emitters and detectors into a single compact package.

Take a look at our full range of Multiple Chip – Multiple Wavelength (MCMW) devices here:
https://marktechopto.com/led-emitters/multiwavelength/

Advantages of Multi‑Wavelength and Multi‑Chip LEDs

Marktech’s multi‑chip products offer design engineers numerous advantages:

• Broad spectral coverage: With combinations spanning UV, visible, NIR, SWIR and MWIR, the devices address applications from biomedical instrumentation to industrial sensing.
• Higher optical power output at specific wavelengths: Compared to broad-spectrum sources filtered or split into multiple wavelengths with a monochromator, multiple-wavelength LEDs provide higher power output, which can improve analysis or detection levels.
• Individually addressable chips: Designers can modulate each wavelength independently for simultaneous or sequential illumination.
• Compact and hermetic packaging: Multiple chips and detectors are assembled in a single sealed package that protects against environmental stress and simplifies system integration.
• Elimination of optical filters and monochromators: Multi‑wavelength LEDs provide the required spectral lines without moving parts, reducing size, cost and warm‑up time.
• Lower power consumption and longer life: Co‑packaged LEDs operate at lower currents and emit less heat than halogen, xenon or mercury vapor sources.
• Fast response and high stability: LEDs switch on and off virtually instantly and exhibit minimal wavelength drift, enabling high‑speed measurements and long‑term stability.
• Reduced part count and simpler circuitry: Combining multiple emitters and detectors into one package minimizes interconnects and reduces board area.

Applications

The nine‑wavelength devices target a wide range of applications:

• Non‑dispersive spectroscopy: Suitable for non‑dispersive IR or UV gas analyzers and biomarker sensors, where simultaneous multi‑wavelength illumination enables rapid, accurate analysis.
• Medical diagnostics: Specific wavelength combinations support oximetry and co‑oximetry, blood glucose monitoring and tissue spectroscopy.
• Fluorescence and fluorescence microscopy: Tunable excitation wavelengths reduce phototoxicity and photobleaching.
• Colorimetry and water quality analyzers: Multi‑color LED sources measure multiple analytes or indicators in a single instrument.
• Wearable and biomedical devices: Co‑packaged emitters and detectors provide compact, low‑power light sources for functional near‑infrared spectroscopy, photoplethysmography and other non‑invasive measurements.
• Industrial and scientific sensing: Applications include hyperspectral light sources, endoscopic lighting, machine vision, contamination detection, and optical communications.

Availability

Standard multi‑wavelength LED emitters are available now in through‑hole and surface‑mount packages with up to nine wavelengths. Custom wavelength combinations, packaging options and integrated detectors are offered to meet specific application requirements. The nine‑wavelength COB emitter is currently available as a standard product or customizable to your specific requirements. For more information or to discuss custom configurations, contact Marktech Optoelectronics at +1 (518) 956‑2980 or visit www.marktechopto.com.