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About Us
Shanghai Yolanda New Material Co., Ltd. is a leading manufacturer of high-performance electronic components, leveraging deep expertise in advanced materials science to deliver innovative and reliable solutions. -
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Precision electronic components powering innovation. Engineered for peak performance & reliability in demanding applications. Discover the essential building blocks driving tomorrow's technology. -
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Electronic components power innovation across industries, forming the essential core of modern technology – from 5G to medical electronics, industrial automation, and test measurement etc,. -
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Optical Module
Application Overview
Hermetic Sealed Package : Protects precision laser chips from moisture/contamination, with a glass window for outputting light signals, ensuring reliable high-speed, long-distance transmission.
Laser diode (LD) - Emitter
Laser diodes offer several advantages, including compact size, lightweight design, low power consumption, simple drive circuits, ease of modulation, resistance to mechanical shock, and vibration tolerance. However, they are highly sensitive to overcurrent, overvoltage, and electrostatic interference. One distinctive feature of laser diodes is their ability to directly modulate the intensity of their output light via current modulation, as the output light power typically exhibits a linear relationship with the input current. In practical applications, APC (Auto Power Control) circuits are typically used to drive laser diodes. These circuits utilize a photodiode (PD) integrated within the same package to receive light from the LD, enabling feedback and monitoring of the LD's output, thereby ensuring the laser diode (LD) maintains a constant required optical power output.
Photodetector (PD/APD) - Receiving end
A photodiode, is a solid-state device with a p-n junction. The conversion of light energy to electricity (current) occurs in the depletion layer and its close proximity by means of the intrinsic photoelectric effect. A PD is, therefore, a photovoltaic device with no internal gain (μ = 1). It has two prongs: an anode on the p side and a cathode on the n side of the junction. Small active area, magnetic immunity, ruggedness, wide spectral coverage, and high temperature sensitivity are some of the features of PDs
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No. 344, Sanlin Road, Pudong New Area, 200124,Shanghai,China