Optical modulator wavelength dependency

In summary, the LN05S intensity modulator with external DC bias has a fixed chirp coefficient and low RF drive voltage, making it suitable for both NRZ and RZ data formats at a frequency of 40 GHz. However, it is only recommended for use in the 1550 nm window, as using it with other wavelengths may result in a temporary increase in loss that is not covered by warranty. Another manufacturer claims a minimal wavelength dependent loss in the range of 1520-1620 nm.
  • #1
mathias718
1
0
What is the effect of using other than 1550nm light with an (LiNbO3, lithium niobate) electro-optic Mach-Zehnder modulator?

Thanks!
 
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  • #2
"The LN05S intensity modulator with external DC bias is a high-performance 40 GHz (40 Gb/s) modulator that has a single-ended drive configuration with a fixed chirp coefficient of ±0.7 and an industry-leading low RF drive voltage (5.5 V). The LN05S has a Mach-Zehnder interferometric architecture with external DC bias, ideal for both NRZ and RZ data format solutions.

Note: The modulators are designed for use in the 1550 nm window. Using the modulators at another wavelength (e.g., visible light) may cause a temporary increase in loss that is not covered under warranty. For instance, the increase in loss caused by shorter wavelengths can be reversed by heating a modulator to 50 °C for an hour."
http://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=3948

A different manufacturer claims: Wavelength dependent loss 1520-1620 nm = <1dB
 

FAQ: Optical modulator wavelength dependency

What is an optical modulator?

An optical modulator is a device used to manipulate the properties of light, such as its intensity, phase, or polarization. It is an essential component in optical communication systems and is used to encode information onto light signals.

How does an optical modulator work?

An optical modulator works by altering the refractive index or absorption of a material in response to an electrical signal. This change in the material's properties affects the way light passes through it, allowing for the manipulation of the light signal.

What is the wavelength dependency of an optical modulator?

The wavelength dependency of an optical modulator refers to how its performance is affected by different wavelengths of light. It is an important consideration in the design and use of optical modulators as different wavelengths may have varying effects on the modulator's performance.

How does the wavelength dependency of an optical modulator impact its effectiveness?

The wavelength dependency of an optical modulator can significantly impact its effectiveness as it can affect the modulator's speed, efficiency, and stability. Therefore, it is crucial to understand and account for the wavelength dependency when designing and using optical modulators.

Can the wavelength dependency of an optical modulator be controlled?

Yes, the wavelength dependency of an optical modulator can be controlled to some extent by selecting the appropriate materials and design parameters. However, some degree of dependency is unavoidable, and it is essential to consider it carefully when using optical modulators in practical applications.

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