Acta Optica Sinica, Volume. 32, Issue 7, 723002(2012)
A Free-Space 2×4 90° Optical Hybrid with Electro-Optic Modulation
A free-space 2×4 90° optical hybrid with electro-optic modulation is designed and fabricated based on the birefringence effect and electro-optic effect of LiNbO3 crystal. It splits and recombines a signal beam and a local oscillator beam by birefringence effect, and the desired phase shift is introduced by electro-optic effect. It realizes the appropriate function of a 2×4 90° optical hybrid under given electric-field conditions. The performance of 2×4 90° optical hybrid is measured experimentally and analyzed. Experimental results show that the optical hybrid has good performance of phase modulation and the proposed 90°optical hybrid. Its phase shift output is tuned electrooptically and phase errors can be compensated by adjusting the applied electric field. It has potential applications in coherent receivers.
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Wan Lingyu, Zhou Yu, Liu Liren, Sun Jianfeng. A Free-Space 2×4 90° Optical Hybrid with Electro-Optic Modulation[J]. Acta Optica Sinica, 2012, 32(7): 723002
Category: Optical Devices
Received: Feb. 5, 2012
Accepted: --
Published Online: May. 31, 2012
The Author Email: Lingyu Wan (wanlingyu75@126.com)