Sei whale localization and vocalization frequency sweep rate estimation during the New Jersey Shallow Water 2006 experiment.

2009 ◽  
Vol 125 (4) ◽  
pp. 2738-2738 ◽  
Author(s):  
Arthur E. Newhall ◽  
Ying‐Tsong Lin ◽  
James F. Lynch ◽  
Mark F. Baumgartner
Keyword(s):  
New Jersey ◽  
Shallow Water ◽  
Sweep Rate ◽  
Frequency Sweep ◽  
Rate Estimation

scholarly journals THz Signal Generator Using a Single DFB Laser Diode and the Unbalanced Optical Fiber Interferometer

Sensors ◽  
2020 ◽  
Vol 20 (17) ◽  
pp. 4862
Author(s):  
Blaž Pongrac ◽  
Denis Đonlagic ◽  
Matej Njegovec ◽  
Dušan Gleich
Keyword(s):  
Optical Fiber ◽  
Laser Diode ◽  
Optical Signal ◽  
Optical Path Difference ◽  
Sweep Rate ◽  
Path Difference ◽  
Optical Path ◽  
Signal Generator ◽  
Optical Frequency ◽  
Frequency Sweep

This paper presents a frequency-modulated optical signal generator in the THz band. The proposed method is based on a fast optical frequency sweep of a single narrowband laser diode used together with an optical fiber interferometer. The optical frequency sweep using a single laser diode is achieved by generating short current pulses with a high amplitude, which are driving the laser diode. Theoretical analysis showed that the modulation frequency could be changed by the optical path difference of the interferometer or optical frequency sweep rate of a laser diode. The efficiency of the optical signal generator with Michelson and Fabry–Perot interferometers is theoretically analyzed and experimentally evaluated for three different scenarios. Interferometers with different optical path differences and a fixed optical frequency sweep rate were used in the first scenario. Different optical frequency sweep rates and fixed optical path differences of the interferometers were used in the second scenario. This paper presents a method for optical chirp generation using a programmable current pulse waveform, which drives a laser diode to achieve nonlinear optical sweep with a fixed optical path difference of the interferometer. The experimental results showed that the proposed signals could be generated within a microwave (1–30 GHz) and THz band (0.1–0.3 THz).

scholarly journals Measurement of shallow‐water sound transmission on the New Jersey continental shelf

1989 ◽  
Vol 86 (S1) ◽  
pp. S8-S8 ◽  
Author(s):  
Lynne Maiocco ◽  
William Carey ◽  
Edwin Parssinen ◽  
James Doutt
Keyword(s):  
New Jersey ◽  
Continental Shelf ◽  
Shallow Water ◽  
Sound Transmission

Shallow-water sound transmission measurements on the New Jersey continental shelf

1995 ◽  
Vol 20 (4) ◽  
pp. 321-336 ◽  
Author(s):  
William M. Carey ◽  
James Doutt ◽  
Richard B. Evans ◽  
Lynne M. Dillman
Keyword(s):  
New Jersey ◽  
Continental Shelf ◽  
Shallow Water ◽  
Sound Transmission ◽  
Transmission Measurements
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