Step-like optical frequency sweep generator using a DBR laser

1995 ◽  
Vol 27 (2) ◽  
pp. 127-131
Author(s):  
Akio Yoshizawa
Keyword(s):  
Optical Frequency ◽  
Frequency Sweep ◽  
Sweep Generator

Fast optical frequency sweep for ultra-fine real-time spectral domain measurement

2006 ◽  
Vol 42 (17) ◽  
pp. 999 ◽  
Author(s):  
T. Kawanishi ◽  
T. Sakamoto ◽  
M. Izutsu
Keyword(s):  
Real Time ◽  
Spectral Domain ◽  
Optical Frequency ◽  
Frequency Sweep

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).

High-speed optical-frequency domain imaging by one frame imaging within one single frequency sweep

2007 ◽  
Author(s):  
Hiroyuki Furukawa ◽  
Takuji Amano ◽  
DongHak Choi ◽  
Hideaki Hiro-Oka ◽  
Kohji Ohbayashi
Keyword(s):  
Frequency Domain ◽  
High Speed ◽  
Single Frequency ◽  
Optical Frequency ◽  
Frequency Sweep ◽  
Optical Frequency Domain Imaging
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