Angular multiplexation of partial helical phase modes in orbital angular momentum holography

Abstract

The orbital angular momentum (OAM) holography has been identified as a vital approach for achieving ultrahigh-capacity multiplexation without a theoretical helical phase index limit. However, the encoding and decoding of an OAM hologram require a complete helical phase mode, which does not take full utilization of the angular space. In this paper, the partial OAM holography is proposed by dividing an OAM mode into several partial orbital angular momentums and encode each partial mode with a different target image. An image can only be reconstructed using an appropriate partial OAM mode within a specific illuminating angular range, henceforth holographic multiplexation of images can be realized. This method can significantly increase the holographic information capacity and find widespread applications.

Multidimensional multiplexing holography based on optical orbital angular momentum lattice multiplexing

“…Various forms of OAM holography have emerged, such as polarization-encrypted OAM holography, ellipticity-encrypted OAM holography, ultradense perfect OAM multiplexed holography, partial OAM holography, modulated OAM holography, multiple-image and multiple-dimensional encrypted OAM multiplexed holography, and holographic strategy for OAM that incorporates complex features by employing deep-learning algorithms. [19][20][21][22][23][24][25][26][27] Despite these advancements, the capacity for encoded information in OAM multiplexed holography remains limited. Moreover, conventional OAM multiplexed holography lacks an additional degree of freedom to enhance both information security and capacity.…”

Multiparameter encrypted orbital angular momentum multiplexed holography based on multiramp helicoconical beams

“…The ultradense perfect OAM multiplexed holography with integer and fractional TCs was investigated, which can achieve two-dimensional spatial division multiplexing in both radial and angular dimensions 19 . Partial OAM holography was proposed in the angular space by dividing an integer OAM mode into several partial phase modes, which can enhance information capacity 20 . The modulated OAM holography was investigated based on the cosine-modulated OAM beams 21 .…”

“…19 Partial OAM holography was proposed in the angular space by dividing an integer OAM mode into several partial phase modes, which can enhance information capacity. 20 The modulated OAM holography was investigated based on the cosine-modulated OAM beams. 21 The multiple-image and multiple-dimensional encrypted OAM multiplexed holography based on the OAM beam with phase jump factor and the modulated chiro-optical beams were implemented.…”

Ellipse‐Like Orbital Angular Momentum Multiplexed Holography and Efficient Decryption Utilizing a Composite Ellipse‐Like Lens

“…[ 38 ] Moreover, partial OAM holography is proposed in the angular space by dividing an integer OAM mode into several partial phase modes, thus enhancing information capacity. [ 39 ] The concept of modulated OAM holography utilizing cosine‐modulated OAM beams is also explored. [ 40 ] Additionally, multiple‐image and multiple‐dimensional encrypted OAM multiplexed holography are implemented based on OAM beams with phase jump factors and modulated chiro‐optical beams.…”