Proposal Number:          21-1- S3.04-1898

          

          

   

Subtopic Title:
      Guidance, Navigation, and Control

          

          

   

Proposal Title:
      Theoretical and Experimental Investigation of Quantum Noise Induced Sensitivity Limit of a Fast Light Ring Laser Gyroscope

          

          

   

Firm:

          

Digital Optics Technologies, Inc.

          

   

Address:

          

1645 Hicks Road, Suite H, Rolling Meadows, IL 60008

          

   

Phone:

          

(847) 358-2592                                                                                                                                                                                

          

   

Name:

          

JASON BONACUM

          

   

E-mail:

          

jason@digital-optics-inc.com

          

   

Address:

          

          

   

Phone:

          

(847) 358-2592                                                                                                                                                                                

          

   

Name:

          

Selim Shahriar

          

   

E-mail:

          

selim1001@aol.com

          

   

Address:

          

1645 Hicks Road, Suite H, IL 60008 - 1227

          

   

Phone:

          

(847) 358-2592                                                                                                                                                                                

          

   

Estimated Technology Readiness Level (TRL) :                                                                                                                                                          
Begin: 3
End: 4

          

          

     

Technical Abstract (Limit 2000 characters, approximately 200 words):

In a Fast-Light Ring Laser Gyroscope (FRLG), the group index is vanishingly small.  The Sagnac effect induced shift in the resonance frequency of each of two counter-propagating lasers, for a given rotation rate, is amplified by a factor equaling the inverse of this group index, compared to that for a conventional ring laser gyroscope (RLG).  This scale factor enhancement coefficient (SFEC) can be as high as a million.  If the quantum noise limited uncertainty in the laser frequency for an FRLG is the same as that for an RLG for otherwise identical operating parameters, this would imply that the factor of enhancement in measurement precision (FEMP) for an FRLG is the same as the SFEC.  However, based on analogy with similar effects in a parity-time symmetric system, it has been suggested that the quantum noise limited uncertainty for an FRLG may be larger than that for an RLG, due to the so-called Petermann factor, thereby reducing the FEMP to a value smaller than the SFEC.  We will carry out theoretical as well as experimental work to establish the maximum possible value of the FEMP that can be achieved under experimentally achievable conditions.  In one track, we will carry out two new types of theoretical modeling for the FRLG to determine how the FEMP varies as a function of the operating parameters: one based on propagating the field using a quantum-enabled finite division time domain technique in the presence of random spontaneous emissions of photons, and the other based on re-ordering the operators in the temporal correlation function.  In the second track, we will use a robust version of a Rb based superluminal laser, which employs a cavity enclosed in a vacuum chamber and highly stabilized pump lasers, to measure the value of the FEMP.  The measurements will be compared with the theoretical models, and used to guide modifications thereof until agreement is achieved.  This will pave the way for further refinement and miniaturization of the FRLG in Phase II.

          

          

     

Potential NASA Applications (Limit 1500 characters, approximately 150 words):

 

• Improved space vehicle positioning and navigation

• Ultra-precise pointing and platform stabilization for telescopes

• Space vehicle health monitoring

• Tests of general relativity via measurement of gravitational frame dragging effect

          

          

     

Potential Non-NASA Applications (Limit 1500 characters, approximately 150 words):

 

• Improved positioning and navigation of missiles

• Positioning and navigation for atmospheric and ground vehicles in GPS-denied environments

• Guidance of unmanned underwater vehicles (UUVs)

• Guidance of smart ammunitions

• Advanced laser beam pointing/steering systems

          

          

     

Duration:     6