scholarly journals High-order Laguerre-Gaussian mode laser generated based on spherical aberration cavity

2022 ◽  
Vol 71 (1) ◽  
pp. 014204-014204
Author(s):  
Liu Jun-Jie ◽  
◽  
Sheng Quan ◽  
Wang Meng ◽  
Zhang Jun-Xiang ◽  
...  
Keyword(s):  
Spherical Aberration ◽  
High Order ◽  
Mode Laser ◽  
Gaussian Mode

scholarly journals High-order Laguerre-Gaussian mode output from spherical aberration cavity

2021 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
◽  
◽  
◽  
◽  
◽  
...  
Keyword(s):  
Spherical Aberration ◽  
High Order ◽  
Gaussian Mode

scholarly journals Contralateral Eye Study On The Characteristics of Corneal Aberration In Patients With Bilateral Keratoconus And Unilateral Corneal Vogt’s Striae

2021 ◽  
Author(s):  
Jing Li ◽  
Yaohua Zhang ◽  
Yong Li ◽  
Yan Cai ◽  
Jing Du ◽  
...  
Keyword(s):  
Spherical Aberration ◽  
Front Surface ◽  
High Order ◽  
Back Surface ◽  
Morphological Parameters ◽  
High Order Aberration ◽  
Contralateral Eye

Abstract Purpose: To assess the corneal high-order aberration(HOA) and its correlation with corneal morphological parameters in patients with bilateral keratoconus (KCN) and unilateral Vogt’s striae.Methods: A total of 168 eyes of 84 patients with KCN, whose corneas had definite signs of unilateral Vogt’s striae were enrolled. Corneal HOA and morphological parameters were measured using Pentacam HR.Results: The corneal morphological parameters between KCN eyes with and without Vogt’s striae were evidently different (P < 0.001). The 3rd coma 90°, 4th spherical aberration, 5th coma 90°, RMS (total), and RMS (HOA) in the front, back surfaces and total cornea in KCN eyes with Vogt’s striae were significantly higher than those in KCN eyes without Vogt’s striae (P < 0.001). In KCN eyes with Vogt’s striae, the 3rd coma 90° and 4th spherical aberration in the front surface and total cornea were negatively correlated with K1, K2, Km, Kmax, ACE, and PCE (P < 0.05). The 3rd coma 90° , 4th spherical aberration in back surface and RMS (total), RMS (HOA) in the front, back surfaces, total cornea were positively correlated with K1, K2, Km, Kmax, ACE, and PCE (P < 0.05).Conclusions: Corneal HOA especially vertical coma and spherical aberration may increase when Vogt’s striae appeared in KCN eyes. The scale of increase was significantly related with changes in corneal shapes.

scholarly journals High Order Aberration Outcomes of Corneal Collagen Crosslinking in Eyes with Keratoconus and Post-LASIK Ectasia

2014 ◽  
Vol 3 (3) ◽  
pp. 107-112
Author(s):  
Adam Muzychuk ◽  
Victor Penner ◽  
Guillermo Rocha
Keyword(s):  
Visual Acuity ◽  
Spherical Aberration ◽  
Retrospective Chart Review ◽  
High Order ◽  
Collagen Crosslinking ◽  
Distance Visual Acuity ◽  
High Order Aberration ◽  
Manifest Refraction ◽  
Corneal Collagen Crosslinking ◽  
Corneal Collagen

ABSTRACT Purpose To evaluate the effect of riboflavin and ultraviolet- A-induced corneal collagen crosslinking (CXL) on high order aberrations (HOA) up to third-order at 6 months using the iTrace wavefront aberrometer in patients with progressive keratoconus and post-LASIK ectasia. Materials and methods Ongoing retrospective chart review of patients having undergone CXL. The iTrace (Tracey Technologies, Houston, TX) was used to evaluate HOA. Patient data was collected from a single clinical site pre- and 6 months postoperatively. Data collected included logMAR uncorrected distance visual acuity (UDVA), logMAR corrected distance visual acuity (CDVA), manifest refraction, and HOA measurements. Data was analyzed with paired two-tailed student's t-test. Results 18 eyes (9M:4F, mean age 29.2 years, range 16-45) had 6 months of follow-up. Total HOAs, total coma and total trefoil were significantly reduced at 6 months by 16, 33 and 26% respectively (p < 0.05). Nonsignificant trends toward improvement were seen in spherical aberration, secondary astigmatism and UDVA. There were no statistically significant changes in manifest refraction or CDVA. Conclusion Improvement in high order aberration profile is one mechanism by which corneal collagen crosslinking enhances visual function in ectatic corneas. Total HOA and total coma measures are the most commonly reported improvements in HOA measures in previous studies, while total trefoil has only been observed in one other study. The improvements seen in HOAs remain fairly modest which likely accounts for the lack of measureable improvement in high-contrast visual acuity measures, such as Snellen UDVA and CDVA. This study is the first to report HOA outcomes with the iTrace wavefront aberrometer. How to cite this article Muzychuk A, Penner V, Rocha G. High Order Aberration Outcomes of Corneal Collagen Crosslinking in Eyes with Keratoconus and Post-LASIK Ectasia. Int J Kerat Ect Cor Dis 2014;3(3):107-112.

scholarly journals All-fiber high-order mode laser using a metal-clad transverse mode filter

2018 ◽  
Vol 26 (23) ◽  
pp. 29679 ◽  
Author(s):  
Yimin Zhang ◽  
Hongxun Li ◽  
Chuansheng Dai ◽  
Lixin Xu ◽  
Chun Gu ◽  
...  
Keyword(s):  
Transverse Mode ◽  
High Order Mode ◽  
High Order ◽  
Order Mode ◽  
Mode Laser

Superresolution Using a Vertical-Cavity Surface-Emitting Laser (VCSEL) with a High-Order Laguerre-Gaussian Mode

2000 ◽  
Vol 39 (Part 1, No. 2B) ◽  
pp. 902-905 ◽  
Author(s):  
Richard A. Flynn ◽  
Osman Kibar ◽  
Daniel Hartmann ◽  
Sadik Esener
Keyword(s):  
High Order ◽  
Cavity Surface ◽  
Vertical Cavity Surface ◽  
Surface Emitting Laser ◽  
Gaussian Mode ◽  
Vertical Cavity

scholarly journals Improved performance of tunable single-mode laser array based on high-order slotted surface grating

2015 ◽  
Vol 23 (9) ◽  
pp. 12072 ◽  
Author(s):  
Azat Abdullaev ◽  
Qiaoyin Lu ◽  
Weihua Guo ◽  
Michael J. Wallace ◽  
Marta Nawrocka ◽  
...  
Keyword(s):  
Single Mode ◽  
High Order ◽  
Laser Array ◽  
Mode Laser ◽  
Single Mode Laser ◽  
Surface Grating ◽  
Improved Performance

High-Order Fluctuations in a Single-Mode Laser Field

1966 ◽  
Vol 16 (1) ◽  
pp. 32-35 ◽  
Author(s):  
F. T. Arecchi ◽  
A. Berné ◽  
P. Bulamacchi
Keyword(s):  
Laser Field ◽  
Single Mode ◽  
High Order ◽  
Mode Laser ◽  
Single Mode Laser

Experimental investigation on direct generation of high order transverse mode laser

2018 ◽  
Vol 47 (6) ◽  
pp. 606002
Author(s):  
陈霞飞 Chen Xiafei ◽  
张凯伦 Zhang Kailun ◽  
陈子阳 Chen Ziyang ◽  
李小燕 Li Xiaoyan ◽  
蒲继雄 Pu Jixiong
Keyword(s):  
Experimental Investigation ◽  
Transverse Mode ◽  
High Order ◽  
Mode Laser ◽  
Direct Generation
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