Mode locking through nonlinear frequency broadening and spectral filtering

1994 ◽  
Author(s):  
Michel Piche
Keyword(s):  
Mode Locking ◽  
Nonlinear Frequency ◽  
Spectral Filtering

Spectral filtering for high-energy mode-locking in normal dispersion fiber lasers

2008 ◽  
Vol 25 (10) ◽  
pp. 1763 ◽  
Author(s):  
Brandon G. Bale ◽  
J. Nathan Kutz ◽  
Andy Chong ◽  
William H. Renninger ◽  
Frank W. Wise
Keyword(s):  
Fiber Lasers ◽  
High Energy ◽  
Mode Locking ◽  
Spectral Filtering ◽  
Normal Dispersion ◽  
Energy Mode

scholarly journals Spectral filtering for ultra-fast mode-locking in the normal dispersive regime

PAMM ◽  
2007 ◽  
Vol 7 (1) ◽  
pp. 2130005-2130006
Author(s):  
Brandon G. Bale ◽  
J Nathan Kutz
Keyword(s):  
Mode Locking ◽  
Fast Mode ◽  
Spectral Filtering

scholarly journals Influence of spectral filtering on mode-locking operation of figure-eight Er-doped fiber laser

2019 ◽  
Vol 68 (6) ◽  
pp. 064206
Author(s):  
Jun-Kai Shi ◽  
Guo-Ming Wang ◽  
Yao Li ◽  
Shu-Yuan Gao ◽  
Li-Tuo Liu ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Mode Locking ◽  
Spectral Filtering ◽  
Er Doped

Spectral filtering for mode locking in the normal dispersive regime

2008 ◽  
Vol 33 (9) ◽  
pp. 941 ◽  
Author(s):  
Brandon G. Bale ◽  
J. Nathan Kutz ◽  
Andy Chong ◽  
William H. Renninger ◽  
Frank W. Wise
Keyword(s):  
Mode Locking ◽  
Spectral Filtering

On-chip Mode-locking in Microresonator Frequency Combs without Spectral Filtering and Shaping

CLEO: 2013 ◽  
2013 ◽  
Author(s):  
Pei-Hsun Wang ◽  
Jian Wang ◽  
Yi Xuan ◽  
Leo Tom Varghese ◽  
Li Fan ◽  
...  
Keyword(s):  
Mode Locking ◽  
Spectral Filtering ◽  
Frequency Combs ◽  
On Chip

Mode locking in cw solid-state lasers by linear and nonlinear frequency shifts

1995 ◽  
Vol 25 (11) ◽  
pp. 1071-1075 ◽  
Author(s):  
V L Kalashnikov ◽  
V P Kalosha ◽  
I G Poloiko ◽  
V P Mikhailov
Keyword(s):  
Solid State ◽  
Mode Locking ◽  
Nonlinear Frequency ◽  
Solid State Lasers ◽  
Frequency Shifts ◽  
Linear And Nonlinear

The S-SH Confusion Test and the Effects of Frequency Lowering

2019 ◽  
Vol 62 (5) ◽  
pp. 1486-1505
Author(s):  
Joshua M. Alexander
Keyword(s):  
Cognitive Processing ◽  
Hearing Aids ◽  
Response Times ◽  
Nonlinear Frequency ◽  
Low Frequencies ◽  
Frequency Compression ◽  
Negative Side ◽  
Minimal Word ◽  
Low Pass ◽  
Negative Side Effects

PurposeFrequency lowering in hearing aids can cause listeners to perceive [s] as [ʃ]. The S-SH Confusion Test, which consists of 66 minimal word pairs spoken by 6 female talkers, was designed to help clinicians and researchers document these negative side effects. This study's purpose was to use this new test to evaluate the hypothesis that these confusions will increase to the extent that low frequencies are altered.MethodTwenty-one listeners with normal hearing were each tested on 7 conditions. Three were control conditions that were low-pass filtered at 3.3, 5.0, and 9.1 kHz. Four conditions were processed with nonlinear frequency compression (NFC): 2 had a 3.3-kHz maximum audible output frequency (MAOF), with a start frequency (SF) of 1.6 or 2.2 kHz; 2 had a 5.0-kHz MAOF, with an SF of 1.6 or 4.0 kHz. Listeners' responses were analyzed using concepts from signal detection theory. Response times were also collected as a measure of cognitive processing.ResultsOverall, [s] for [ʃ] confusions were minimal. As predicted, [ʃ] for [s] confusions increased for NFC conditions with a lower versus higher MAOF and with a lower versus higher SF. Response times for trials with correct [s] responses were shortest for the 9.1-kHz control and increased for the 5.0- and 3.3-kHz controls. NFC response times were also significantly longer as MAOF and SF decreased. The NFC condition with the highest MAOF and SF had statistically shorter response times than its control condition, indicating that, under some circumstances, NFC may ease cognitive processing.ConclusionsLarge differences in the S-SH Confusion Test across frequency-lowering conditions show that it can be used to document a major negative side effect associated with frequency lowering. Smaller but significant differences in response times for correct [s] trials indicate that NFC can help or hinder cognitive processing, depending on its settings.

Sign in / Sign up

Export Citation Format

Share Document