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Comparison of Alexandrite and Diode Lasers for Hair Removal in Dark and Medium Skin: Which is Better?

Farhad Hamad Mustafa, Mohamad Suhimi Jaafar, Asaad Hamid Ismail, Kussay Nugamesh Mutter




Introduction: To improve laser hair removal (LHR) for dark skin, the fluence rate reaching the hair follicle in LHR is important. This paper presents the results of a comparative study examining the function of wavelength on dark skin types using 755 nm alexandrite and 810 nm diode lasers.

Methods: The structure of the skin was created using a realistic skin model by the Advanced Systems Analysis Program.

Result: In this study, the alexandrite laser (755 nm) and diode laser (810 nm) beam–skin tissue interactions were simulated. The simulation results for both lasers differed. The transmission ratio of the diode laser to the dark skin dermis was approximately 4% more than that of the alexandrite laser for the same skin type. For the diode laser at skin depth z = 0.67 mm, the average transmission ratios of both samples were 36% and 27.5%, but those for the alexandrite laser at the same skin depth were 32% and 25%.

Conclusion: Both lasers were suitable in LHR for dark skin types, but the diode laser was better than the alexandrite laser because the former could penetrate deeper into the dermis layer.


lasers; simulation; skin; diode laser


Grossman MC, Dierickx C, Farinelli W, Flotte T, Anderson RR. Damage to hair follicles by normal-mode ruby laser pulses. J Am Acad Dermatol 1996;35(6):889-94.

Mustafa FH, Jaafar MS, Ismail AH, Omar AF, Timimi ZA, Houssein HA. Control Light Delivery in PDT by Taking Account the Optical Properties of Hair Density on the Skin Surface. Modern Appl Sci 2011;5(2): 149-55.

Karsten A, Singh A. Quantifying the influence of the epidermal optical properties on laser treatment parameters. in European Conferences on Biomedical Optics. 2013: International Society for Optics and Photonics.

Mustafa F, Jaafar M. Comparison of wavelength-dependent penetration depths of lasers in different types of skin in photodynamic therapy. Indian J Phys 2013; 87(3):203–9.

Battle E. Laser hair removal for darker skin types. In: Andrew F. Alexis and Victoria H. Barbosa (eds.), Skin of Color: A Practical Guide to Dermatologic Diagnosis and Treatment (New York: Springer, 2013), 237–46.

Lanigan SW. Incidence of side effects after laser hair removal. J Am Acad Dermatol 2003; 49(5): 882–6.

Casey AS, Goldberg D. Guidelines for laser hair removal. J Cosmet Laser Ther 2008; 10(1): 24–33.

Garcia C, Alamoudi H, Nakib M, Zimmo S. Alexandrite Laser Hair Removal is Safe for Fitzpatrick Skin Types IV‐VI. Dermatol Surg 2000; 26(2): 130–4.

Ibrahimi OA, Avram MM, Hanke CW, Kilmer SL, Anderson RR. Laser hair removal. Dermatol Ther 2011; 24(1): 94–107.

Sever C, Şahina C, Bayramb Y, Uygura F, Külahçıa Y. Unusual Complication Caused by Laser Hair Remova:skin burnsl. J Exp Clin Med 2012; 29(1):74-6.

Nanni CA, Alster TS. Long‐pulsed alexandrite laser‐assisted hair removal at 5, 10, and 20 millisecond pulse durations. Lasers Surg Med 1999; 24(5): 332–7.

Gan SD, Graber EM. Laser Hair Removal: A Review. Dermatol Surg 2013;39(6): 823-38.

Amin SP, Goldberg DJ. Clinical comparison of four hair removal lasers and light sources. J Cosmet Laser Ther 2006; 8(2): 65–8.

Toosi P, Sadighha A, Sharifian A, Razavi GM. A comparison study of the efficacy and side effects of different light sources in hair removal. Lasers Med Sci 2006; 21(1): 1–4.

Klein A, Steinert S, Baeumler W, Landthaler M, Babilas P. Photoepilation with a diode laser vs. intense pulsed light: a randomized, intrapatient left‐to‐right trial. Br J Dermatol 2013;168(6):1287-93.

Michel B, Beck TJ. Raytracing in Medical Applications. Laser + Photonik 5 (2005): 38-40

Karsten AE, Singh A, Braun MW. Experimental verification and validation of a computer model for light–tissue interaction. Lasers Med Sci 2012;27(1): 79–86.

Karsten A. What is the effect of different skin types on the required dose for photodynamic therapy? Biophotonics Group, NLC, CSIR, 2008.

Kolari PJ. Penetration of unfocused laser light into the skin. Arch Dermatol Res 1985; 277(4): 342–4.

Gold MH. An Update on Lasers and Light Sources for the Removal of Unwanted Hair. Prime 2012.

Fontana CR, Bonini D, Bagnato VS. A 12-month follow-up of hypopigmentation after laser hair removal. J Cosmet Laser Ther 2013; 15(2): 80–4.

Rao K, Sankar TK. Long-pulsed Nd: YAG laser-assisted hair removal in Fitzpatrick skin types IV–VI. Lasers Med Sci 2011; 26(5): 623–6.

Wanitphakdeedecha R, Thanomkitti K, Sethabutra P, Eimpunth S, Manuskiatti W. A split axilla comparison study of axillary hair removal with low fluence high repetition rate 810 nm diode laser vs. high fluence low repetition rate 1064 nm Nd: YAG laser. J Eur Acad Dermatol Venereol 2012; 26(9): 1133–6.

Rogachefsky AS, Silapunt S, Goldberg DJ. Evaluation of a new super‐long‐pulsed 810 nm diode laser for the removal of unwanted hair: The concept of thermal damage time. Dermatol Surg 2002; 28(5): 410–4.

DOI: https://doi.org/10.22037/jlms.v5i4.6057