All-optical triode based on a tandem wavelength converter using cross-gain modulation in semiconductor optical amplifiers

Yoshinobu Maeda

doi:10.1117/12.614351

15 September 2005 All-optical triode based on a tandem wavelength converter using cross-gain modulation in semiconductor optical amplifiers

Yoshinobu Maeda

Author Affiliations +

Proceedings Volume 5907, Photonic Devices and Algorithms for Computing VII; 59070R (2005) https://doi.org/10.1117/12.614351
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

An all-optical triode based on a tandem wavelength converter was realized in reflective InGaAsP-InP semiconductor optical amplifiers using the same 1551 nm wavelength for input, control and output. The output power ranged from 0 to 2 mW when the average control power was varied from 0 to 0.3 mW. Therefore, the output-input characteristics can be changed dynamically by low control powers. The output modulation degree was retained over a wide control power range of 0.01-1 mW. Because of its characteristics, this device can become a key component in future all-optical signal processing. In addition, a negative feedback optical amplification effect was confirmed using negative feedback based on cross-gain modulation in the all-optical triode. The optical amplification is capable of providing an output signal whose gain, waveform and baseline are stabilized without generating excessive noise. The amplification degree is retained at around 0 dB at an input power range of 0.01-1 mW and reaches -2 dB at 5 mW. The desired amplification can be adjusted by changing the amount of the negative feedback using the variable optical attenuator. The distortion of the waveform was extremely small in the wide frequency band of 0.1-10 GHz. The optical amplifier is physically considered as the optical equivalent of a non-inverting negative feedback amplifier and is capable of constituting an optical limiter.

Citation Download Citation

Yoshinobu Maeda "All-optical triode based on a tandem wavelength converter using cross-gain modulation in semiconductor optical amplifiers", Proc. SPIE 5907, Photonic Devices and Algorithms for Computing VII, 59070R (15 September 2005); https://doi.org/10.1117/12.614351

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