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LD-PD, a Singapore-based company pioneering photonic innovation, has emerged as a leading innovator in the photonics industry with a strong focus on high-power, high-reliability laser diodes, photodetectors, photodiodes, and driver technologies. Backed by a dedicated R&D team and advanced manufacturing capabilities, the company delivers cutting-edge solutions to diverse markets, including automotive, LiDAR, medical, industrial, and scientific applications. Featured on GoPhotonics, LD-PD’s extensive portfolio features nearly 600 laser diodes, over 100 photodetectors, and a wide range of optoelectronic components that address the evolving needs of modern optical systems.

LD-PD continues to strengthen its presence in the global photonics landscape with the launch of next-generation products, including optical frequency converters for LiDAR and spectroscopy, and high-performance InGaAs avalanche photodetectors spanning the 800–1700 nm range. These advancements demonstrate the company’s commitment to enabling high-performance solutions across critical industries and pushing the boundaries of precision optics worldwide.

PPLN-SHG-1550-P6-P2-H: Optical Frequency Converter

The PPLN-SHG-1550-P6-P2-H is a fiber-coupled optical frequency converter, designed for efficient second harmonic generation (SHG), sum-frequency generation (SFG), and difference-frequency generation (DFG). It converts a 1550 nm continuous-wave, single-longitudinal-mode input (via PM1550 fiber, no connector) into a linearly polarized 775 nm output (via PM780), delivering more than 2 W of power when pumped with 5.5 W. The module features a periodically poled lithium niobate (PPLN) waveguide, integrated with a thermoelectric cooler (TEC) and a 10 kΩ NTC thermistor, all housed within a compact module measuring 90 x 32 x 16 mm. Rated for reliable use in a temperature range of 10 °C to 35 °C (operating) and -20 °C to 70 °C (storage), this module is ideal for high-performance applications such as quantum secure communication, LiDAR, optical sensing, and laser displays.

APD-100M-A: Compact InGaAs Avalanche Photodetector Module

The APD-100M-A is a high-sensitivity InGaAs avalanche photodetector optimized for near-infrared applications. It covers a spectral range of 800 nm to 1700 nm with a bandwidth of 100 MHz, delivering a robust transimpedance gain of 300 kV/W and an impressive noise equivalent power (NEP) of just 0.46 pWrt(Hz) - highlighting its sensitivity in low-light detection scenarios. The unit offers an output impedance of 50 Ω and can handle up to 13 µW of optical input power. It supports both FC/APC (or free-space) and SMA connectors, operates from a standard 5 V supply at 0.5 A current consumption, and comes in a compact 65 x 50 x 20 mm module design. Well-suited for applications like optical fiber sensing, fiber communication, laser ranging, and spectrometry.

OL-MZI-1300: Compact Mach-Zehnder Interferometer Module

The OL-MZI-1300 is a compact Mach-Zehnder interferometer designed for optical coherence tomography and other coherent applications, operating across 1225 nm - 1375 nm with a free spectral range of 103.3 GHz and supporting up to 50 mW input power at 1300 nm. Housed in a 120 x 100 x 25 mm module, it integrates a fixed 2 mm arm-difference interferometer with an InGaAs/PIN balanced detector offering 200 MHz bandwidth, built on SMF-28 polarization-maintaining fiber with FC/APC input and SMA output connectors. Powered by a 5 V DC supply at 0.5 A, the unit is engineered with shock absorption and thermal insulation for stability, making it an ideal choice for OCT systems and precision interferometric setups.

PL-DFB-0780-A-A81-PA: Tunable DFB Laser Diode

The PL-DFB-0780-A-A81-PA is a tunable, continuous-wave distributed feedback (DFB) laser diode meticulously optimized for precision applications like tunable diode laser absorption spectroscopy and coherent population trapping. Operating at 779.5 nm, it delivers a narrow linewidth of up to 2 MHz and an optical output around 8 mW, with an excellent side mode suppression ratio of 45 dB and a quantum efficiency of 0.01 mW/mA. The laser is housed in a 14-pin butterfly package (measuring 55 x 32.7 mm), features a built-in thermistor and photodiode, and supports PM780 fiber coupling with FC/APC connectors. It operates at a threshold current of about 28 mA, forward voltage of 2.1 V, and typical drive current around 100 mA. Thermal stabilization is achieved via an integrated thermoelectric cooler (TEC) drawing under 1 A at up to 3.3 V. The module remains reliable across a chip operating range of 10 °C to 40 °C and a case storage range from -5 °C to 70 °C.

PL-BC-1550-6.9-0016-37.1: Fixed-Focus Large Beam Collimator

The PL-BC-1550-6.9-0016-37.1 is a high-performance, fixed-focus large beam collimator engineered for precise optical transmission and coupling tasks at 1550 nm. It features an effective focal length of 37.1 mm, a beam divergence angle of 0.016°, and delivers >95% transmissivity due to its AR-coated, air-gap glued aspheric/achromatic lens design - all enclosed within a compact 44.25 mm x 24 mm package. The unit supports SMF-28e fiber input and is compatible with FC/PC, FC/APC, and SMA905 connectors, making it versatile for integration into fiber-optic systems. Its 24 mm collimated beam diameter and numerical aperture of 0.24 ensure efficient performance in collimation and coupling applications across the 1050 nm - 1700 nm coating range.

Together, LD-PD’s expanding portfolio - including advanced optical frequency converters, high-sensitivity photodetectors, precision interferometers, tunable laser diodes, and large beam collimators - demonstrates the company’s commitment to delivering high-performance, reliable photonic solutions. Highlighted on GoPhotonics, these innovations underscore LD-PD’s role in shaping next-generation applications across quantum communication, LiDAR, optical sensing, laser systems, and fiber-optic technologies, reinforcing its position as a trusted partner in the global photonics landscape.