Novel bulk optic multichannel resonator device for close packed wavelength multiplexing.

Area of Science:

• Optics and Photonics
• Optical Communications
• Integrated Optics

Background:

• Dense wavelength division multiplexing (DWDM) is crucial for increasing optical network capacity.
• Existing multiplexing/demultiplexing technologies face limitations in channel spacing and integration.

Purpose of the Study:

• To present a simple bulk optic structure for high-density wavelength multiplexing/demultiplexing.
• To demonstrate the feasibility of a novel device combining a Fabry-Perot etalon and a diffraction grating.

Main Methods:

• Design and fabrication of a bulk optic structure using a high finesse Fabry-Perot etalon.
• Integration of a low efficiency diffraction grating onto one face of the etalon.
• Experimental evaluation of a laboratory model for multiplexing/demultiplexing performance.

Main Results:

• The proposed device enables multiplexing ratios exceeding 10 with channel separations below 1 GHz.
• A laboratory model demonstrated demultiplexing of nine channels with 2.2 GHz spacing, achieving 20 GHz total capacity.
• The model exhibited -7 dB throughput optical coupling and a signal-to-crosstalk ratio greater than 15 dB.

Conclusions:

• The demonstrated bulk optic structure is a viable solution for high-capacity optical networks.
• The device offers a promising approach for future DWDM systems requiring dense channel spacing.
• Further development could lead to scalable and cost-effective optical multiplexing/demultiplexing solutions.